Update grape gem

Gemfile

@@ -66,8 +66,8 @@ gem 'gollum-rugged_adapter', '~> 0.4.2', require: false
 gem "github-linguist", "~> 4.7.0", require: "linguist"
 # API
-gem 'grape',        '~> 0.13.0'
-gem 'grape-entity', '~> 0.4.2'
+gem 'grape',        '~> 0.16.2'
+gem 'grape-entity', '~> 0.5.1'
 gem 'rack-cors',    '~> 0.4.0', require: 'rack/cors'
 # Pagination

Gemfile.lock

@@ -182,6 +182,7 @@ GEM
       launchy (~> 2.1)
       mail (~> 2.2)
     encryptor (1.3.0)
+    enumerable-lazy (0.0.1)
     equalizer (0.0.11)
     erubis (2.7.0)
     escape_utils (1.1.1)
@@ -381,17 +382,17 @@ GEM
       json
       multi_json
       request_store (>= 1.0)
-    grape (0.13.0)
+    grape (0.16.2)
       activesupport
       builder
       hashie (>= 2.1.0)
       multi_json (>= 1.3.2)
       multi_xml (>= 0.5.2)
+      mustermann19 (~> 0.4.3)
       rack (>= 1.3.0)
       rack-accept
-      rack-mount
       virtus (>= 1.0.0)
-    grape-entity (0.4.8)
+    grape-entity (0.5.1)
       activesupport
       multi_json (>= 1.3.2)
     haml (4.0.7)
@@ -475,6 +476,8 @@ GEM
     multi_json (1.11.2)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
+    mustermann19 (0.4.3)
+      enumerable-lazy
     mysql2 (0.3.20)
     nested_form (0.3.2)
     net-ldap (0.12.1)
@@ -581,8 +584,6 @@ GEM
     rack-attack (4.3.1)
       rack
     rack-cors (0.4.0)
-    rack-mount (0.8.3)
-      rack (>= 1.0.0)
     rack-oauth2 (1.2.1)
       activesupport (>= 2.3)
       attr_required (>= 0.0.5)
@@ -945,8 +946,8 @@ DEPENDENCIES
   gollum-lib (~> 4.1.0)
   gollum-rugged_adapter (~> 0.4.2)
   gon (~> 6.0.1)
-  grape (~> 0.13.0)
-  grape-entity (~> 0.4.2)
+  grape (~> 0.16.2)
+  grape-entity (~> 0.5.1)
   haml-rails (~> 0.9.0)
   hipchat (~> 1.5.0)
   html-pipeline (~> 1.11.0)