Fix Ruby 2.7 keyword deprecation warning in validators/coerce#2131

dblock merged 2 commits intoruby-grape:masterruby-grape/grape:masterfrom

K0H205:fix/ruby-2.7-keyword-deprecations_coerce_validatorK0H205/grape:fix/ruby-2.7-keyword-deprecations_coerce_validatorCopy head branch name to clipboard