Clean up prettier ignore and remove bower config

.prettierignore

@@ -1,6 +1,7 @@
-/dist
 /api-docs
-package-lock.json
-/coverage
-libs/
 /api-extractor/report*
+/coverage
+/demo/libs
+/dist
+/lib
+package-lock.json

README.md

@@ -318,7 +318,8 @@ For a complete list of issues see ["Top priorities" in the Release Planning and
 - `#EXT-X-DATERANGE` in "metadata" TextTracks [#2218](https://github.com/video-dev/hls.js/issues/2218)
 - `#EXT-X-GAP` filling [#2940](https://github.com/video-dev/hls.js/issues/2940)
 - `SAMPLE-AES` with fmp4, aac, mp3, vtt... segments (MPEG-2 TS only)
-- Advance variant selection based on runtime media capabilities (See issues labeled [`media-capabilities`](https://github.com/video-dev/hls.js/labels/media-capabilities))
+- Advanced variant selection based on runtime media capabilities (See issues labeled [`media-capabilities`](https://github.com/video-dev/hls.js/labels/media-capabilities))
+- MP3 elementary stream audio in IE and Edge (<=18) on Windows 10 (See [#1641](https://github.com/video-dev/hls.js/issues/1641) and [Microsoft answers forum](https://answers.microsoft.com/en-us/ie/forum/all/ie11-on-windows-10-cannot-play-hls-with-mp3/2da994b5-8dec-4ae9-9201-7d138ede49d9))
 
 ### Server-side-rendering (SSR) and `require` from a Node.js runtime