Do the required to make builds pass with better-discord.js

src/bot.ts

src/channelsyncroniser.ts

src/clientfactory.ts

src/db/schema/dbschema.ts

src/db/schema/v3.ts

src/db/schema/v8.ts

src/db/schema/v9.ts

src/discordcommandhandler.ts

src/discordmessageprocessor.ts

src/matrixcommandhandler.ts

src/matrixeventprocessor.ts

src/matrixmessageprocessor.ts

src/matrixroomhandler.ts

src/presencehandler.ts

src/provisioner.ts

src/usersyncroniser.ts

src/util.ts

test/mocks/channel.ts

test/mocks/collection.ts

test/mocks/guild.ts