Drop Java 8 from build (have tested it with Ubuntu!) #4

All 387 tests pass, 1 skipped in 1m 15s

43 files ±0 43 suites ±0 1m 15s ⏱️ -3s
388 tests ±0 387 ✅ ±0 1 💤 ±0 0 ❌ ±0
389 runs ±0 388 ✅ ±0 1 💤 ±0 0 ❌ ±0

Results for commit d980a34. ± Comparison against earlier commit 6ab9d25.