Subject: | Set license properly |
Currently when executing `perl Makefile.PL`, "Invalid LICENSE value 'GPL-2.0+' ignored" is emitted.
```
$ perl Makefile.PL
Checking if your kit is complete...
Looks good
Invalid LICENSE value 'GPL-2.0+' ignored
Generating a Unix-style Makefile
Writing Makefile for Perl::Tidy
Invalid LICENSE value 'GPL-2.0+' ignored
Writing MYMETA.yml and MYMETA.json
```
Moreover, metacpan says "License: unknown".
https://metacpan.org/release/SHANCOCK/Perl-Tidy-20180220
According to https://metacpan.org/pod/CPAN::Meta::Spec#license,
we should set LICENSE gpl_2 for GPL-2.0.
Here is a patch for this.
https://gist.github.com/skaji/5d18e055ee161d47106098826a133472
Thanks.