Add parse benchmark #148

Job	Run time
Document	19s
Gem: 3.0 on ubuntu-latest	10s
Gem: head on ubuntu-latest	10s
Gem: 3.0 on macos-latest	15s
Gem: head on macos-latest	17s
Gem: 3.0 on windows-latest	1m 1s
Gem: head on windows-latest	51s
ruby-versions / Generate Ruby versions	2s
Inplace: 2.5 on ubuntu-latest	25s
Inplace: 2.6 on ubuntu-latest	22s
Inplace: 2.7 on ubuntu-latest	24s
Inplace: 3.0 on ubuntu-latest	10s
Inplace: 3.1 on ubuntu-latest	16s
Inplace: 3.2 on ubuntu-latest	10s
Inplace: 3.3 on ubuntu-latest	12s
Inplace: head on ubuntu-latest	10s
Inplace: jruby on ubuntu-latest	48s
Inplace: jruby-head on ubuntu-latest	39s
Inplace: 2.5 on macos-latest	1m 23s
Inplace: 2.6 on macos-latest	1m 2s
Inplace: 2.7 on macos-latest	49s
Inplace: 3.0 on macos-latest	17s
Inplace: 3.1 on macos-latest	21s
Inplace: 3.2 on macos-latest	19s
Inplace: 3.3 on macos-latest	17s
Inplace: head on macos-latest	1m 41s
Inplace: jruby on macos-latest	45s
Inplace: jruby-head on macos-latest	43s
Inplace: 2.5 on windows-latest	2m 42s
Inplace: 2.6 on windows-latest	3m 5s
Inplace: 2.7 on windows-latest	1m 48s
Inplace: 3.0 on windows-latest	1m 18s
Inplace: 3.1 on windows-latest	1m 9s
Inplace: 3.2 on windows-latest	1m 17s
Inplace: 3.3 on windows-latest	2m 58s
Inplace: head on windows-latest	1m 25s
Inplace: jruby on windows-latest	2m 4s
Inplace: jruby-head on windows-latest	1m 52s
	33m 56s

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