Test fixes and linting

src/channelsyncroniser.ts

src/db/roomstore.ts

src/matrixroomhandler.ts

src/provisioner.ts

src/store.ts

test/db/test_roomstore.ts

test/test_channelsyncroniser.ts

test/test_discordbot.ts

test/test_matrixroomhandler.ts

tools/addRoomsToDirectory.ts

tools/chanfix.ts

tools/ghostfix.ts