Merge pull request #63 from splitrb/dependabot/bundler/sinatra-3.0.4

Bump sinatra from 3.0.3 to 3.0.4

Author: andrehjr

Gemfile.lock

@@ -4,15 +4,15 @@ GEM
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     rack (2.2.4)
-    rack-protection (3.0.3)
+    rack-protection (3.0.4)
       rack
     redis (4.5.1)
     ruby2_keywords (0.0.5)
     rubystats (0.3.0)
-    sinatra (3.0.3)
+    sinatra (3.0.4)
       mustermann (~> 3.0)
       rack (~> 2.2, >= 2.2.4)
-      rack-protection (= 3.0.3)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
     split (4.0.1)
       redis (>= 4.2)