target ES2022 with more strict typing

src/handlers/space-created-handler.ts

src/handlers/space-deleted-handler.ts

src/handlers/space-updated-handler.ts

src/handlers/space-user-added-handler.ts

src/handlers/space-user-left-handler.ts

src/handlers/space-user-removed-handler.ts

src/handlers/user-deleted-handler.ts

src/handlers/user-name-updated-handler.ts

src/helpers/chainedError.ts

src/helpers/matrixClient.ts

src/utils.ts

tsconfig.json