Update dependencies

Gemfile.lock

@@ -17,7 +17,7 @@ GEM
     coderay (1.1.2)
     colorize (0.8.1)
     concurrent-ruby (1.0.5)
-    diffy (3.2.0)
+    diffy (3.2.1)
     erubis (2.7.0)
     httparty (0.15.6)
       multi_xml (>= 0.5.2)
@@ -29,23 +29,23 @@ GEM
     mono_logger (1.1.0)
     multi_json (1.12.2)
     multi_xml (0.6.0)
-    mustermann (1.0.1)
-    perf_check (0.10.1)
+    mustermann (1.0.3)
+    perf_check (0.10.2)
       colorize
       diffy
       rake
     pry (0.11.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rack (2.0.3)
-    rack-protection (2.0.0)
+    rack (2.0.5)
+    rack-protection (2.0.4)
       rack
     rack-test (0.7.0)
       rack (>= 1.0, < 3)
     racksh (1.0.0)
       rack (>= 1.0)
       rack-test (>= 0.5)
-    rake (12.3.0)
+    rake (12.3.1)
     redis (4.0.1)
     redis-namespace (1.6.0)
       redis (>= 3.0.4)
@@ -55,10 +55,10 @@ GEM
       redis-namespace (~> 1.3)
       sinatra (>= 0.9.2)
       vegas (~> 0.1.2)
-    sinatra (2.0.0)
+    sinatra (2.0.4)
       mustermann (~> 1.0)
       rack (~> 2.0)
-      rack-protection (= 2.0.0)
+      rack-protection (= 2.0.4)
       tilt (~> 2.0)
     sinatra-activerecord (2.0.13)
       activerecord (>= 3.2)
@@ -92,4 +92,4 @@ DEPENDENCIES
   sqlite3
 
 BUNDLED WITH
-   1.16.1
+   1.16.4