Update dependency css-loader to v6

See merge request !13

Update dependency style-loader to v3

See merge request !12

Update dependency matrix-js-sdk to v12

See merge request !11

Resolve "Login scene for browser backend"

Closes #5

See merge request !6

Merge branch '5-login-scene-for-browser-backend' of edugit.org:auglement/augmentile into 5-login-scene-for-browser-backend

Say hello to Makoto, the Augle[m]ent Mouse!