fix: Resolve TypeScript errors

Signed-off-by: Hermes Agent <hermes@nosuchhost>

client/node_modules/lib0/dist/testing.test.d.ts

@@ -0,0 +1,9 @@
+export function nottestingNotTested(): void;
+export function testAssertTyping(): void;
+export function testComparing(_tc: t.TestCase): void;
+export function testFailing(): Promise<void>;
+export function testSkipping(): void;
+export function testAsync(): Promise<void>;
+export function testRepeatRepetition(): void;
+import * as t from './testing.js';
+//# sourceMappingURL=testing.test.d.ts.map