refactor: log error in test runner script

Author: wozjac

src/test/runTest.ts

@@ -14,6 +14,7 @@ async function main() {
     // Download VS Code, unzip it and run the integration test
     await runTests({ extensionDevelopmentPath, extensionTestsPath });
   } catch (err) {
+    console.error(err);
     console.error("Failed to run tests");
     process.exit(1);
   }