diff --git a/package-lock.json b/package-lock.json
index 1ca6db5..a3f555f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -34,10 +34,16 @@
       "integrity": "sha1-ze0RlqjY2TgaUJJAq5LpGl7Aafc=",
       "dev": true
     },
-    "@ava/pretty-format": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/@ava/pretty-format/-/pretty-format-1.1.0.tgz",
-      "integrity": "sha1-0KV9Jeua6rlkO90aAwZCuRwSPig=",
+    "@ava/write-file-atomic": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/@ava/write-file-atomic/-/write-file-atomic-2.2.0.tgz",
+      "integrity": "sha512-BTNB3nGbEfJT+69wuqXFr/bQH7Vr7ihx2xGOMNqPgDGhwspoZhiWumDDZNjBy7AScmqS5CELIOGtPVXESyrnDA==",
+      "dev": true
+    },
+    "@concordance/react": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@concordance/react/-/react-1.0.0.tgz",
+      "integrity": "sha512-htrsRaQX8Iixlsek8zQU7tE8wcsTQJ5UhZkSPEA8slCDAisKpC/2VgU/ucPn32M5/LjGGXRaUEKvEw1Wiuu4zQ==",
       "dev": true
     },
     "@semantic-release/commit-analyzer": {
@@ -293,17 +299,35 @@
       "dev": true
     },
     "ava": {
-      "version": "0.19.1",
-      "resolved": "https://registry.npmjs.org/ava/-/ava-0.19.1.tgz",
-      "integrity": "sha1-Q92CQ1rRmzmA/8okiPBdqrlAsnM=",
+      "version": "0.20.0",
+      "resolved": "https://registry.npmjs.org/ava/-/ava-0.20.0.tgz",
+      "integrity": "sha512-/Jw/TwBgptUzDGB4bmpOO9flrUoJBZOA6YpAB6Y1NpH/nDTrS6JEZ/KeeMcgBm3Kk6ytTWsvpYWHK83V1RBzQA==",
       "dev": true,
       "dependencies": {
+        "ansi-escapes": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-2.0.0.tgz",
+          "integrity": "sha1-W65SvkJIeN2Xg+iRDj/Cki6DyBs=",
+          "dev": true
+        },
+        "ansi-styles": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.1.0.tgz",
+          "integrity": "sha1-CcIC1ckX7CMYjKpcnLkXnNlUd1A=",
+          "dev": true
+        },
         "chalk": {
           "version": "1.1.3",
           "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
           "dependencies": {
+            "ansi-styles": {
+              "version": "2.2.1",
+              "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
+              "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
+              "dev": true
+            },
             "supports-color": {
               "version": "2.0.0",
               "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
@@ -312,6 +336,12 @@
             }
           }
         },
+        "ms": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-1.0.0.tgz",
+          "integrity": "sha1-Wa3NIu3FQ/e1OBhi0xOHsfS8lHM=",
+          "dev": true
+        },
         "update-notifier": {
           "version": "2.2.0",
           "resolved": "https://registry.npmjs.org/update-notifier/-/update-notifier-2.2.0.tgz",
@@ -1022,6 +1052,12 @@
       "integrity": "sha1-CqxmL9Ur54lk1VMvaUeE5wEQrPc=",
       "dev": true
     },
+    "concordance": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/concordance/-/concordance-2.0.0.tgz",
+      "integrity": "sha512-jVxBZbAkFIZE5WHCAL7RpkX+XPl9ZnT8uYjZ9EXPFSquNDgq2iXWFsT2iptVoxvfSL+/5ej8CdHsmE7XYJjCPA==",
+      "dev": true
+    },
     "config-chain": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/config-chain/-/config-chain-1.1.11.tgz",
@@ -1263,18 +1299,6 @@
       "integrity": "sha1-f3Qt4Gb8dIvI24IFad3c5Jvw1FY=",
       "dev": true
     },
-    "diff": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/diff/-/diff-3.2.0.tgz",
-      "integrity": "sha1-yc45Okt8vQsFinJck98pkCeGj/k=",
-      "dev": true
-    },
-    "diff-match-patch": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/diff-match-patch/-/diff-match-patch-1.0.0.tgz",
-      "integrity": "sha1-HMPIOkkNZ/ldkeOfatHy4Ia2MEg=",
-      "dev": true
-    },
     "doctrine": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-2.0.0.tgz",
@@ -1615,6 +1639,12 @@
       "resolved": "https://registry.npmjs.org/fallback-cli/-/fallback-cli-2.0.2.tgz",
       "integrity": "sha1-VGFW4CFAAMosIhedFJlY09rKta8="
     },
+    "fast-diff": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/fast-diff/-/fast-diff-1.1.1.tgz",
+      "integrity": "sha1-CuoOTmBbaiGJ8Ok21Lf7rxt8/Zs=",
+      "dev": true
+    },
     "fast-levenshtein": {
       "version": "2.0.6",
       "resolved": "https://registry.npmjs.org/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz",
@@ -2400,6 +2430,12 @@
       "integrity": "sha1-FhdnFMgBeY5Ojyz391KUZ7tKV3E=",
       "dev": true
     },
+    "function-name-support": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/function-name-support/-/function-name-support-0.2.0.tgz",
+      "integrity": "sha1-VdO/qm6v1QWlD5vIH99XVkoLsHE=",
+      "dev": true
+    },
     "gauge": {
       "version": "2.7.4",
       "resolved": "https://registry.npmjs.org/gauge/-/gauge-2.7.4.tgz",
@@ -2692,6 +2728,26 @@
       "integrity": "sha1-BWmOPUXIjo1+nZLLBYTnfwlvPkM=",
       "dev": true
     },
+    "import-local": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/import-local/-/import-local-0.1.1.tgz",
+      "integrity": "sha1-sReVcqrNwRxqkQCftDDbyrX2aKg=",
+      "dev": true,
+      "dependencies": {
+        "pkg-dir": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/pkg-dir/-/pkg-dir-2.0.0.tgz",
+          "integrity": "sha1-9tXREJ4Z1j7fQo4L1X4Sd3YVM0s=",
+          "dev": true
+        },
+        "resolve-cwd": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/resolve-cwd/-/resolve-cwd-2.0.0.tgz",
+          "integrity": "sha1-AKn3OHVW4nA46uIyyqNypqWbZlo=",
+          "dev": true
+        }
+      }
+    },
     "imurmurhash": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/imurmurhash/-/imurmurhash-0.1.4.tgz",
@@ -3047,138 +3103,12 @@
       "integrity": "sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo=",
       "dev": true
     },
-    "jest-diff": {
-      "version": "19.0.0",
-      "resolved": "https://registry.npmjs.org/jest-diff/-/jest-diff-19.0.0.tgz",
-      "integrity": "sha1-0VY8/FbItgIymI+8BdTRbtkPBjw=",
-      "dev": true,
-      "dependencies": {
-        "chalk": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
-          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-          "dev": true
-        }
-      }
-    },
-    "jest-file-exists": {
-      "version": "19.0.0",
-      "resolved": "https://registry.npmjs.org/jest-file-exists/-/jest-file-exists-19.0.0.tgz",
-      "integrity": "sha1-zKLlh6EeyS4kz+qz+KlNZX8/zrg=",
-      "dev": true
-    },
-    "jest-matcher-utils": {
-      "version": "19.0.0",
-      "resolved": "https://registry.npmjs.org/jest-matcher-utils/-/jest-matcher-utils-19.0.0.tgz",
-      "integrity": "sha1-Xs2bY1ZdKwAfYfv37Ex/U3lkVk0=",
-      "dev": true,
-      "dependencies": {
-        "chalk": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
-          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-          "dev": true
-        }
-      }
-    },
-    "jest-message-util": {
-      "version": "19.0.0",
-      "resolved": "https://registry.npmjs.org/jest-message-util/-/jest-message-util-19.0.0.tgz",
-      "integrity": "sha1-cheWuJwOTXYWBvm6jLgoo7YkZBY=",
-      "dev": true,
-      "dependencies": {
-        "chalk": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
-          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-          "dev": true
-        }
-      }
-    },
-    "jest-mock": {
-      "version": "19.0.0",
-      "resolved": "https://registry.npmjs.org/jest-mock/-/jest-mock-19.0.0.tgz",
-      "integrity": "sha1-ZwOGQelgerLOCOxKjLg6q7yJnQE=",
+    "js-string-escape": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/js-string-escape/-/js-string-escape-1.0.1.tgz",
+      "integrity": "sha1-4mJbrbwNZ8dTPp7cEGjFh65BN+8=",
       "dev": true
     },
-    "jest-snapshot": {
-      "version": "19.0.2",
-      "resolved": "https://registry.npmjs.org/jest-snapshot/-/jest-snapshot-19.0.2.tgz",
-      "integrity": "sha1-nBshYhT3GHw4v9XHCx76sWsP9Qs=",
-      "dev": true,
-      "dependencies": {
-        "chalk": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
-          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-          "dev": true
-        }
-      }
-    },
-    "jest-util": {
-      "version": "19.0.2",
-      "resolved": "https://registry.npmjs.org/jest-util/-/jest-util-19.0.2.tgz",
-      "integrity": "sha1-4KAjKiq55rK1Nmi9s1NMK1l37UE=",
-      "dev": true,
-      "dependencies": {
-        "chalk": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
-          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-          "dev": true
-        }
-      }
-    },
-    "jest-validate": {
-      "version": "19.0.2",
-      "resolved": "https://registry.npmjs.org/jest-validate/-/jest-validate-19.0.2.tgz",
-      "integrity": "sha1-3FNN9fEnjVtj3zKxQkHU2/ckTAw=",
-      "dev": true,
-      "dependencies": {
-        "chalk": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
-          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-          "dev": true
-        }
-      }
-    },
     "js-tokens": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-3.0.1.tgz",
@@ -3278,12 +3208,6 @@
       "integrity": "sha1-ogU4P+oyKzO1rjsYq+4NwvNW7hU=",
       "dev": true
     },
-    "leven": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/leven/-/leven-2.1.0.tgz",
-      "integrity": "sha1-wuep93IJTe6dNCAq6KzORoeHVYA=",
-      "dev": true
-    },
     "levn": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/levn/-/levn-0.3.0.tgz",
@@ -3654,10 +3578,10 @@
       "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
       "dev": true
     },
-    "ms": {
-      "version": "0.7.3",
-      "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.3.tgz",
-      "integrity": "sha1-cIFVpeROM/X9D8U+gdDUCpG+H/8=",
+    "moment": {
+      "version": "2.18.1",
+      "resolved": "https://registry.npmjs.org/moment/-/moment-2.18.1.tgz",
+      "integrity": "sha1-w2GT3Tzhwu7SrbfIAtu8d6gbHA8=",
       "dev": true
     },
     "multimatch": {
@@ -4052,20 +3976,6 @@
       "integrity": "sha1-gV7R9uvGWSb4ZbMQwHE7yzMVzks=",
       "dev": true
     },
-    "pretty-format": {
-      "version": "19.0.0",
-      "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-19.0.0.tgz",
-      "integrity": "sha1-VlMNMqy5ij+khRxOK503tCBoTIQ=",
-      "dev": true,
-      "dependencies": {
-        "ansi-styles": {
-          "version": "3.1.0",
-          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.1.0.tgz",
-          "integrity": "sha1-CcIC1ckX7CMYjKpcnLkXnNlUd1A=",
-          "dev": true
-        }
-      }
-    },
     "pretty-ms": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/pretty-ms/-/pretty-ms-2.1.0.tgz",
@@ -4885,6 +4795,12 @@
       "integrity": "sha1-WIeWa7WCpFA6QetST301ARgVphM=",
       "dev": true
     },
+    "trim-off-newlines": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/trim-off-newlines/-/trim-off-newlines-1.0.1.tgz",
+      "integrity": "sha1-n5up2e+odkw4dpi8v+sshI8RrbM=",
+      "dev": true
+    },
     "trim-right": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/trim-right/-/trim-right-1.0.1.tgz",
@@ -5000,6 +4916,12 @@
       "integrity": "sha1-MbTbZnjyrgHDnqn7hyWpAx5Vins=",
       "dev": true
     },
+    "well-known-symbols": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/well-known-symbols/-/well-known-symbols-1.0.0.tgz",
+      "integrity": "sha1-c8eK6Bp3Jqj6WY4ogIAcixYiVRg=",
+      "dev": true
+    },
     "which": {
       "version": "1.2.14",
       "resolved": "https://registry.npmjs.org/which/-/which-1.2.14.tgz",
diff --git a/package.json b/package.json
index d6a6955..0c72588 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "update-notifier": "^2.2.0"
   },
   "devDependencies": {
-    "ava": "^0.19.1",
+    "ava": "^0.20.0",
     "babel-preset-env": "^1.5.2",
     "husky": "^0.14.0",
     "semantic-release": "^6.3.6",