fix(core,testing): improve type safety and update tests for latest tstest and storage APIs

test/test.pypi.ts

@@ -62,7 +62,7 @@ tap.test('PyPI: should upload wheel file (POST /pypi/)', async () => {
   formData.append('pyversion', 'py3');
   formData.append('metadata_version', '2.1');
   formData.append('sha256_digest', hashes.sha256);
-  formData.append('content', new Blob([testWheelData]), filename);
+  formData.append('content', new Blob([Uint8Array.from(testWheelData)]), filename);
 
   const response = await registry.handleRequest({
     method: 'POST',