bump version to 4.5.9 #1694

All 716 tests pass, 6 skipped in 1m 14s

166 files +  39 166 suites +39 1m 14s ⏱️ +12s
722 tests - 103 716 ✔️ - 108 6 💤 +5 0 ❌ ±0
728 runs -   98 722 ✔️ - 103 6 💤 +5 0 ❌ ±0

Results for commit ef245f2. ± Comparison against earlier commit 560c66d.