Update to libv8-node 20.x #126

Job	Run time
macos-11 - truffleruby+graalvm-head	3m 46s
linux-amd64 - ruby-3.0 - gnu	50m 31s
macos-12 - truffleruby+graalvm-head	2m 38s
macos-11 - ruby-3.0	46s
linux-amd64 - ruby-3.0 - musl	21s
ubuntu-20.04 - truffleruby+graalvm-head	1m 56s
macos-11 - ruby-3.1	51s
linux-arm64 - ruby-3.0 - gnu	6h 0m 15s
linux-arm64 - ruby-3.0 - musl	2m 46s
macos-11 - ruby-3.2	1m 11s
linux-amd64 - ruby-3.1 - gnu	1h 0m 52s
macos-12 - ruby-3.0	46s
linux-amd64 - ruby-3.1 - musl	36s
macos-12 - ruby-3.1	29s
linux-arm64 - ruby-3.1 - gnu	6h 0m 13s
macos-12 - ruby-3.2	32s
linux-arm64 - ruby-3.1 - musl	2m 28s
linux-amd64 - ruby-3.2 - gnu	1h 0m 39s
linux-amd64 - ruby-3.2 - musl	31s
linux-arm64 - ruby-3.2 - gnu	6h 0m 14s
linux-arm64 - ruby-3.2 - musl	10m 17s
	21h 22m 38s

Provide feedback