Merge master into avatar

__tests__/erasure.test.js

__tests__/example.test.js

package-lock.json

public/cursor.svg

public/service-worker.js

public/styles.css

src/app.js

src/canvas.js

src/connection/Connection.js

src/connection/WebRTC.js

src/erasure.js

src/queue.js

src/room.js

src/tool-selection.js

src/y-p2p-mesh.js

src/y-webrtc/LICENSE