RFC: proof-of-concept for feature-tracking and perl sub signatures (see #273) #243

Job	Run time
Build distribution	57s
coverage-job	4m 13s
Perl 5.8 on ubuntu-20.04	59s
Perl 5.10 on ubuntu-20.04	52s
Perl 5.12 on ubuntu-20.04	52s
Perl 5.14 on ubuntu-20.04	43s
Perl 5.16 on ubuntu-20.04	54s
Perl 5.18 on ubuntu-20.04	44s
Perl 5.20 on ubuntu-20.04	48s
Perl 5.22 on ubuntu-20.04	44s
Perl 5.24 on ubuntu-20.04	46s
Perl 5.26 on ubuntu-20.04	43s
Perl 5.28 on ubuntu-20.04	47s
Perl 5.30 on ubuntu-20.04	47s
Perl 5.32 on ubuntu-20.04	50s
Perl 5.34 on ubuntu-20.04	52s
Perl 5.36 on ubuntu-20.04	50s
Perl 5.38 on ubuntu-20.04	50s
perl ${{ matrix.perl-version }} on windows-latest	0s
perl ${{ matrix.perl-version }} on macos-latest	0s
	18m 11s

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