Bump progressbar.js from 1.1.0 to 1.1.1 (#16)

Bumps [progressbar.js](https://github.com/kimmobrunfeldt/progressbar.js) from 1.1.0 to 1.1.1.
- [Release notes](https://github.com/kimmobrunfeldt/progressbar.js/releases)
- [Commits](kimmobrunfeldt/progressbar.js@1.1.0...1.1.1)

---
updated-dependencies:
- dependency-name: progressbar.js
  dependency-type: direct:production
...

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package.json

@@ -95,7 +95,7 @@
     "global-tunnel-ng": "^2.7.1",
     "materialize-css": ">=1.0.0",
     "normalize-url": ">=4.5.1",
-    "progressbar.js": ">=1.1.0",
+    "progressbar.js": ">=1.1.1",
     "tree-kill": ">=1.2.2",
     "ytdl-core": ">=4.11.2"
   },