Implement new Javascript test case sync mechanism #224

All 1 281 tests pass, 15 skipped in 1m 19s

      4 files       4 suites 1m 19s ⏱️
1 296 tests 1 281 ✔️ 15 💤 0 ❌
1 302 runs 1 287 ✔️ 15 💤 0 ❌

Results for commit f9f233f.