commonmark: experimental minimize #1234

Job	Run time
build_bin_spec (nightly)	26m 40s
build_lib_test (nightly)	55s
build_wasm (nightly)	47s
build_bin_spec (beta)	1m 3s
build_lib_test (beta)	1m 3s
build_wasm (beta)	49s
build_bin_spec (stable)	56s
build_lib_test (stable)	59s
build_wasm (stable)	50s
build_bin_spec ($MSRV)	3m 14s
build_lib_test ($MSRV)	3m 35s
build_wasm ($MSRV)	3m 13s
clippy_format	2m 58s
lockfile	51s
no_features_build_test (nightly)	30s
no_features_build_test (beta)	27s
no_features_build_test (stable)	31s
no_features_build_test ($MSRV)	2m 36s
	51m 57s

Provide feedback