Merge pull request #31 from buildkite/dependabot/bundler/puma-5.6.8

Bump puma from 5.6.7 to 5.6.8

Author: pzeballos

Gemfile.lock

@@ -4,8 +4,8 @@ GEM
     diff-lcs (1.3)
     knapsack (1.14.0)
       rake
-    nio4r (2.5.9)
-    puma (5.6.7)
+    nio4r (2.7.0)
+    puma (5.6.8)
       nio4r (~> 2.0)
     rake (13.0.1)
     rspec (3.6.0)