bump version to 4.5.9 #1694

All 800 tests pass, 1 skipped in 1m 32s

114 files - 13 114 suites - 13 1m 32s ⏱️ +30s
801 tests - 24 800 ✔️ - 24 1 💤 ±0 0 ❌ ±0
802 runs - 24 801 ✔️ - 24 1 💤 ±0 0 ❌ ±0

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