gemspec: use SPDX-compatible license for GPL-2.0+
commit495ee76f9168523e10b9e343a22e21e183e81d41
authorEric Wong <e@80x24.org>
Mon, 19 Oct 2015 21:12:46 +0000 (19 21:12 +0000)
committerEric Wong <e@80x24.org>
Mon, 19 Oct 2015 21:18:07 +0000 (19 21:18 +0000)
treec6b038678d6509b39cf3501d20fbf935754cfaa1
parent4e42b60205ebb2ead8535e77658ccffb206346f1
gemspec: use SPDX-compatible license for GPL-2.0+

Current versions of RubyGems still complains about the '+'
is valid according to: http://spdx.org/licenses
rainbows.gemspec