Merge pull request #51 from splitrb/dependabot/bundler/sinatra-2.0.8.1

Bump sinatra from 2.0.7 to 2.0.8.1

Author: andrehjr

Gemfile.lock

@@ -1,16 +1,18 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    mustermann (1.0.3)
+    mustermann (1.1.0)
+      ruby2_keywords (~> 0.0.1)
     rack (2.0.8)
-    rack-protection (2.0.7)
+    rack-protection (2.0.8.1)
       rack
     redis (4.1.3)
+    ruby2_keywords (0.0.1)
     simple-random (1.0.3)
-    sinatra (2.0.7)
+    sinatra (2.0.8.1)
       mustermann (~> 1.0)
       rack (~> 2.0)
-      rack-protection (= 2.0.7)
+      rack-protection (= 2.0.8.1)
       tilt (~> 2.0)
     split (3.4.1)
       redis (>= 2.1)