Merge branch 'gem-update-grape' into 'master'

Update grape to 0.18.0

## What does this MR do?

Update grape to 0.18.0. Required for the settings API.

## What are the relevant issue numbers?

#22928

See merge request !8057

Gemfile

@@ -67,7 +67,7 @@ gem 'gollum-rugged_adapter', '~> 0.4.2', require: false
 gem 'github-linguist', '~> 4.7.0', require: 'linguist'
 
 # API
-gem 'grape',        '~> 0.15.0'
+gem 'grape',        '~> 0.18.0'
 gem 'grape-entity', '~> 0.6.0'
 gem 'rack-cors',    '~> 0.4.0', require: 'rack/cors'
 

Gemfile.lock

@@ -284,15 +284,15 @@ GEM
       json
       multi_json
       request_store (>= 1.0)
-    grape (0.15.0)
+    grape (0.18.0)
       activesupport
       builder
       hashie (>= 2.1.0)
       multi_json (>= 1.3.2)
       multi_xml (>= 0.5.2)
+      mustermann-grape (~> 0.4.0)
       rack (>= 1.3.0)
       rack-accept
-      rack-mount
       virtus (>= 1.0.0)
     grape-entity (0.6.0)
       activesupport
@@ -400,6 +400,10 @@ GEM
     multi_json (1.12.1)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
+    mustermann (0.4.0)
+      tool (~> 0.2)
+    mustermann-grape (0.4.0)
+      mustermann (= 0.4.0)
     mysql2 (0.3.20)
     net-ldap (0.12.1)
     net-ssh (3.0.1)
@@ -505,14 +509,12 @@ GEM
     pry-rails (0.3.4)
       pry (>= 0.9.10)
     pyu-ruby-sasl (0.0.3.3)
-    rack (1.6.4)
+    rack (1.6.5)
     rack-accept (0.4.5)
       rack (>= 0.4)
     rack-attack (4.4.1)
       rack
     rack-cors (0.4.0)
-    rack-mount (0.8.3)
-      rack (>= 1.0.0)
     rack-oauth2 (1.2.3)
       activesupport (>= 2.3)
       attr_required (>= 0.0.5)
@@ -743,6 +745,7 @@ GEM
     tilt (2.0.5)
     timecop (0.8.1)
     timfel-krb5-auth (0.8.3)
+    tool (0.2.3)
     truncato (0.7.8)
       htmlentities (~> 4.3.1)
       nokogiri (~> 1.6.1)
@@ -861,7 +864,7 @@ DEPENDENCIES
   gollum-lib (~> 4.2)
   gollum-rugged_adapter (~> 0.4.2)
   gon (~> 6.1.0)
-  grape (~> 0.15.0)
+  grape (~> 0.18.0)
   grape-entity (~> 0.6.0)
   haml_lint (~> 0.18.2)
   hamlit (~> 2.6.1)

changelogs/unreleased/gem-update-grape.yml

+---
+title: 'Gem update: Update grape to 0.18.0'
+merge_request:
+author: Robert Schilling