Hardcoded mime type

[edgardozoppi]

In the following line (i) it should use the same mime type used when creating the MediaRecorder object in line (ii).

i)

react-multimedia-capture/src/index.js

Line 233 in e926289

let blob = new Blob(this.mediaChunk, { type: 'video/webm' });

ii)

react-multimedia-capture/src/index.js

Line 146 in e926289

let mediaRecorder = new MediaRecorder(this.stream, options);

This fix is required to properly support Safari as it currently do not support webm mime types.