Bump sinatra from 2.0.3 to 2.2.0

Bumps [sinatra](https://github.com/sinatra/sinatra) from 2.0.3 to 2.2.0.
- [Release notes](https://github.com/sinatra/sinatra/releases)
- [Changelog](https://github.com/sinatra/sinatra/blob/master/CHANGELOG.md)
- [Commits](sinatra/sinatra@v2.0.3...v2.2.0)

---
updated-dependencies:
- dependency-name: sinatra
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile

@@ -9,7 +9,7 @@ gem 'sidekiq',         '~> 4.0.0'
 gem 'redis-namespace'
 
 gem 'puma'
-gem 'sinatra',         '~> 2.0.3'
+gem 'sinatra',         '~> 2.2.0'
 gem 'rake',            '~> 12.3.3'
 
 gem 'sentry-raven'

Gemfile.lock

@@ -45,15 +45,16 @@ GEM
       metriks (>= 0.9.9.6)
     minitest (5.11.3)
     multipart-post (2.0.0)
-    mustermann (1.0.3)
+    mustermann (1.1.1)
+      ruby2_keywords (~> 0.0.1)
     nio4r (2.5.8)
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     puma (4.3.9)
       nio4r (~> 2.0)
     rack (2.2.3)
-    rack-protection (2.0.3)
+    rack-protection (2.2.0)
       rack
     rack-test (1.0.0)
       rack (>= 1.0, < 3)
@@ -69,20 +70,21 @@ GEM
     rspec-expectations (2.99.2)
       diff-lcs (>= 1.1.3, < 2.0)
     rspec-mocks (2.99.4)
+    ruby2_keywords (0.0.5)
     sentry-raven (2.7.3)
       faraday (>= 0.7.6, < 1.0)
     sidekiq (4.0.2)
       concurrent-ruby (~> 1.0)
       connection_pool (~> 2.2, >= 2.2.0)
       redis (~> 3.2, >= 3.2.1)
-    sinatra (2.0.3)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.3)
+      rack (~> 2.2)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
     thor (0.20.0)
     thread_safe (0.3.6)
-    tilt (2.0.8)
+    tilt (2.0.10)
     travis-config (1.0.13)
       hashr (~> 2.0.0)
     tzinfo (1.2.5)
@@ -106,7 +108,7 @@ DEPENDENCIES
   rspec (~> 2.9)
   sentry-raven
   sidekiq (~> 4.0.0)
-  sinatra (~> 2.0.3)
+  sinatra (~> 2.2.0)
   travis-config (~> 1.0.0)
   travis-support!
   yajl-ruby (~> 1.4.0)