Blurhash support (#701)

* Generate blurhash client side

* Make blurhash generation faster

* Simple blurhash display support

* Make image display simpler

* Support non square images

* Don't attach video blurhash to thumbnail

* Add video display support

* Ignore alt tag missing warning

Co-authored-by: Ajay Bura <32841439+ajbura@users.noreply.github.com>

package.json

@@ -20,6 +20,7 @@
     "@matrix-org/olm": "https://gitlab.matrix.org/api/v4/projects/27/packages/npm/@matrix-org/olm/-/@matrix-org/olm-3.2.8.tgz",
     "@tippyjs/react": "^4.2.6",
     "babel-polyfill": "^6.26.0",
+    "blurhash": "^1.1.5",
     "browser-encrypt-attachment": "^0.3.0",
     "dateformat": "^5.0.3",
     "emojibase-data": "^7.0.1",
@@ -40,6 +41,7 @@
     "prop-types": "^15.8.1",
     "react": "^17.0.2",
     "react-autosize-textarea": "^7.1.0",
+    "react-blurhash": "^0.1.3",
     "react-dnd": "^15.1.2",
     "react-dnd-html5-backend": "^15.1.3",
     "react-dom": "^17.0.2",