adapt testing and continuous integration guides #122

All 647 tests pass in 6m 43s

647 tests ±0 647 ✔️ ±0 6m 43s ⏱️ +4s
    1 suites ±0     0 💤 ±0
    1 files ±0     0 ❌ ±0

Results for commit 91e35e7. ± Comparison against earlier commit 4c67572.