Merge pull request #476 from sparklemotion/dependabot/bundler/minitest-5.21.1

build(deps-dev): update minitest requirement from 5.20.0 to 5.21.1

Author: flavorjones

Gemfile

@@ -3,7 +3,7 @@ source "https://rubygems.org"
 gemspec
 
 group :development do
-  gem "minitest", "5.20.0"
+  gem "minitest", "5.21.1"
 
   gem "rake-compiler", "1.2.5"
   gem "rake-compiler-dock", "1.4.0"