do not set frozen-string-literal env var for ruby 2.2 [changelog skip] #2066
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kmossco
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Description
Closes: #2064
Ruby 2.2 doesn't accept this literal with a warning in the Travis build:
Ideally I'd prefer to have this as a global variable and add an exception for Ruby 2.2 in case there are more versions added later on. But looking at the docs doesn't seem like there is a way to do that: https://docs.travis-ci.com/user/environment-variables/#global-variables.