fix v8 date math #319

Job	Run time
windows (windows-2022, Release, amd64)	20m 24s
Linux (bun-webkit-linux-amd64-debug, big-ubuntu, x64, Debug)	15m 26s
macOS (macos-13-large, haswell, bun-webkit-macos-amd64-debug, /usr/local/opt, x64, Debug)	31m 55s
windows (windows-2022, Debug, amd64, -debug)	20m 12s
Linux (bun-webkit-linux-arm64-debug, linux-arm64, arm64, Debug)	17m 58s
macOS (macos-13-xlarge, native, bun-webkit-macos-arm64-debug, /opt/homebrew/opt, arm64, Debug)	18m 52s
Linux (-flto='full', bun-webkit-linux-arm64-lto, linux-arm64, arm64, Release)	23m 19s
macOS (macos-13-large, -flto='full', haswell, bun-webkit-macos-amd64-lto, /usr/local/opt, x64, Re...	25m 16s
Linux (bun-webkit-linux-arm64, linux-arm64, arm64, Release)	15m 45s
macOS (macos-13-large, haswell, bun-webkit-macos-amd64, /usr/local/opt, x64, Release)	18m 34s
Linux (-flto='full', bun-webkit-linux-amd64-lto, big-ubuntu, x64, Release)	21m 8s
macOS (macos-13-xlarge, -flto='full', native, bun-webkit-macos-arm64-lto, /opt/homebrew/opt, arm6...	14m 6s
Linux (bun-webkit-linux-amd64, big-ubuntu, x64, Release)	15m 2s
macOS (macos-13-xlarge, native, bun-webkit-macos-arm64, /opt/homebrew/opt, arm64, Release)	10m 36s
release	0s
	4h 28m 33s

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