Pinned ffi_compiler2 version to 2.0.1 #35

Job	Run time
prepare / prepare	4s
Test with Metanorma on Ruby Object macos-latest	5m 36s
Test with Metanorma on Ruby Object ubuntu-latest	3m 43s
Test on Ruby 2.7 macos-latest	55s
Test with Metanorma on Ruby Object windows-latest	8m 8s
Test on Ruby 2.7 ubuntu-latest	32s
Test with Metanorma on Ruby Object macos-latest	6m 21s
Test on Ruby 2.7 windows-latest	2m 5s
Test with Metanorma on Ruby Object ubuntu-latest	2m 54s
Test on Ruby 3.0 macos-latest	23s
Test with Metanorma on Ruby Object windows-latest	9m 28s
Test on Ruby 3.0 ubuntu-latest	15s
Test with Metanorma on Ruby Object macos-latest	7m 32s
Test on Ruby 3.0 windows-latest	1m 33s
Test with Metanorma on Ruby Object ubuntu-latest	2m 48s
Test with Metanorma on Ruby Object windows-latest	9m 22s
Test on Ruby 3.1 macos-latest	14s
Test with Metanorma on Ruby Object macos-latest	9m 45s
Test on Ruby 3.1 ubuntu-latest	8s
Test with Metanorma on Ruby Object ubuntu-latest	3m 23s
Test on Ruby 3.1 windows-latest	1m 4s
Test with Metanorma on Ruby Object windows-latest	11m 39s
Test on Ruby 3.2 macos-latest	18s
Test on Ruby 3.2 ubuntu-latest	11s
Test on Ruby 3.2 windows-latest	1m 10s
Release gem	0s
	1h 29m 31s

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