Use RecordRTC as audio recorder

Old one does not work anymore. Maybe this is a good option?

package.json

@@ -21,7 +21,6 @@
     "dayjs": "^1.10.3",
     "deepmerge": "^4.3.1",
     "file-saver": "^2.0.5",
-    "fix-webm-duration": "^1.0.0",
     "image-resize": "^1.4.1",
     "image-size": "^2.0.2",
     "intersection-observer": "^0.12",
@@ -29,14 +28,14 @@
     "linkify-html": "^4.1.0",
     "linkifyjs": "^4.1.0",
     "material-design-icons-iconfont": "^6.7.0",
-    "matrix-js-sdk": "^37.3.0",
+    "matrix-js-sdk": "^37.5.0",
     "md-gum-polyfill": "^1.0.0",
-    "mic-recorder-to-mp3": "^2.2.2",
     "path-browserify": "^1.0.1",
     "pretty-bytes": "^5.6.0",
     "process": "^0.11.10",
     "qrcode": "^1.5.4",
     "raw-loader": "^4.0.2",
+    "recordrtc": "^5.6.2",
     "roboto-fontface": "*",
     "stream-browserify": "^3.0.0",
     "tiny-emitter": "^2.1.0",