make old tests pass

src/discordcommandhandler.ts

src/matrixcommandhandler.ts

src/matrixtypes.ts

src/util.ts

test/test_discordbot.ts

test/test_discordcommandhandler.ts

test/test_matrixcommandhandler.ts

test/test_matrixeventprocessor.ts

test/test_matrixroomhandler.ts

test/test_util.ts