add html, style and js linter as npm script

.htmlhintrc

@@ -1,16 +1,19 @@
-
 {
-  "attr-lowercase":           true,
-  "attr-no-duplication":      true,
-  "alt-require":              true,
-  "attr-unsafe-chars":        true,
+  "attr-lowercase": true,
+  "attr-no-duplication": true,
+  "attr-unsafe-chars": true,
   "attr-value-double-quotes": true,
-  "doctype-first":            false,
-  "doctype-html5":            true,
-  "id-unique":                true,
-  "spec-char-escape":         true,
-  "src-not-empty":            true,
-  "tag-pair":                 true,
-  "tagname-lowercase":        true,
-  "title-require":            false
+  "attr-value-not-empty": true
+  "doctype-first": true,
+  "doctype-html5": true,
+  "id-class-value": "dash",
+  "id-unique": true,
+  "inline-script-disabled": true,
+  "inline-style-disabled": true,
+  "space-tab-mixed-disabled": "space",
+  "spec-char-escape": true,
+  "src-not-empty": true,
+  "tag-pair": true,
+  "tagname-lowercase": true,
+  "title-require": false,
 }

.stylelintrc

@@ -0,0 +1,3 @@
+{
+  "extends": "stylelint-config-standard"
+}

package.json

@@ -7,18 +7,27 @@
   "author": "rbutr Community",
   "license": "LGPL-3.0",
   "devDependencies": {
+    "concurrently": "^3.4.0",
     "eslint": "^3.19.0",
     "eslint-config-google": "^0.7.1",
     "eslint-config-standard": "^10.2.1",
     "eslint-plugin-promise": "^3.5.0",
     "eslint-plugin-standard": "^3.0.1",
-    "node-sass": "^4.5.2"
+    "htmlhint": "^0.9.13",
+    "node-sass": "^4.5.2",
+    "stylelint": "^7.10.1"
   },
   "scripts": {
     "sass": "node-sass src/scss/main.scss --output src/css --source-map-embed --source-map-contents",
     "watch:sass": "npm run sass -- --watch",
-    "lint": "eslint src",
+    "lint:js": "eslint --config .eslintrc.json src;",
+    "lint:style": "stylelint --config .stylelintrc src/scss/*.scss;",
+    "lint:html": "htmlhint --config .htmlhintrc src/**/*.html;",
+    "lint": "concurrently --names  lint:html, lint:style, lint:js -p name 'npm run lint:html' 'npm run lint:style' 'npm run lint:js';",
     "zip": "mkdir -p build && zip -r build/rbutr.zip ./src/*",
-    "build": "npm run sass && npm run zip"
+    "build": "lint && npm run sass && npm run zip"
+  },
+  "dependencies": {
+    "stylelint-config-standard": "^16.0.0"
   }
 }