Merge pull request #12 from kddnewton/dependabot/bundler/minitest-5.15.0

Bump minitest from 5.14.4 to 5.15.0

Author: github-actions[bot]

Gemfile.lock

@@ -9,7 +9,7 @@ GEM
     ast (2.4.2)
     benchmark-ips (2.9.2)
     docile (1.4.0)
-    minitest (5.14.4)
+    minitest (5.15.0)
     parser (3.0.3.2)
       ast (~> 2.4.1)
     rake (13.0.6)