[Ruby] Update roda to 3.31.0 (the-benchmarker#2488)

dependabot-preview[bot] · web-flow · commit deaece383dcc · 2020-04-16T11:07:34.000+02:00
diff --git a/ruby/roda/Gemfile b/ruby/roda/Gemfile
@@ -3,4 +3,4 @@
 source 'https://rubygems.org'
 
 gem 'puma'
-gem 'roda', '~> 3.30.0'
+gem 'roda', '~> 3.31.0'
diff --git a/ruby/roda/config.yaml b/ruby/roda/config.yaml
@@ -1,3 +1,3 @@
 framework:
   website: roda.jeremyevans.net
-  version: 3.30
+  version: 3.31
