bump rubygems to 3.2.x for ruby-2.7 #20
Merged
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bumping the the rubygems to > 3.2.x
solves a rootless container issues that is trying to be solved in #19
original issue rubygems/rubygems#3977
fix is included in 3.2.3 see release notes https://github.com/rubygems/rubygems/releases/tag/v3.2.3
Includes this commit: rubygems/rubygems@eb5b99b