Add parse benchmark #146

Job	Run time
Document	19s
Gem: 3.0 on ubuntu-latest	9s
Gem: head on ubuntu-latest	11s
Gem: 3.0 on macos-latest	21s
Gem: head on macos-latest	15s
Gem: 3.0 on windows-latest	1m 2s
Gem: head on windows-latest	58s
ruby-versions / Generate Ruby versions	2s
Inplace: 2.5 on ubuntu-latest	21s
Inplace: 2.6 on ubuntu-latest	27s
Inplace: 2.7 on ubuntu-latest	23s
Inplace: 3.0 on ubuntu-latest	16s
Inplace: 3.1 on ubuntu-latest	14s
Inplace: 3.2 on ubuntu-latest	15s
Inplace: 3.3 on ubuntu-latest	17s
Inplace: head on ubuntu-latest	16s
Inplace: jruby on ubuntu-latest	50s
Inplace: jruby-head on ubuntu-latest	45s
Inplace: 2.5 on macos-latest	1m 2s
Inplace: 2.6 on macos-latest	3m 4s
Inplace: 2.7 on macos-latest	50s
Inplace: 3.0 on macos-latest	21s
Inplace: 3.1 on macos-latest	17s
Inplace: 3.2 on macos-latest	55s
Inplace: 3.3 on macos-latest	1m 33s
Inplace: head on macos-latest	20s
Inplace: jruby on macos-latest	50s
Inplace: jruby-head on macos-latest	1m 5s
Inplace: 2.5 on windows-latest	2m 18s
Inplace: 2.6 on windows-latest	2m 18s
Inplace: 2.7 on windows-latest	2m 5s
Inplace: 3.0 on windows-latest	1m 14s
Inplace: 3.1 on windows-latest	1m 25s
Inplace: 3.2 on windows-latest	1m 50s
Inplace: 3.3 on windows-latest	2m 6s
Inplace: head on windows-latest	1m 9s
Inplace: jruby on windows-latest	1m 53s
Inplace: jruby-head on windows-latest	1m 51s
	35m 47s

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