Bump sinatra from 2.1.0 to 2.2.0

Bumps [sinatra](https://github.com/sinatra/sinatra) from 2.1.0 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@v2.1.0...v2.2.0)

---
updated-dependencies:
- dependency-name: sinatra
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -288,7 +288,7 @@ GEM
     rack (2.2.3)
     rack-mini-profiler (2.1.0)
       rack (>= 1.2.0)
-    rack-protection (2.1.0)
+    rack-protection (2.2.0)
       rack
     rack-proxy (0.6.5)
       rack
@@ -434,7 +434,7 @@ GEM
     ruby-graphviz (1.2.5)
       rexml
     ruby-progressbar (1.10.1)
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.5)
     rubyzip (1.3.0)
     rufus-scheduler (3.6.0)
       fugit (~> 1.1, >= 1.1.6)
@@ -482,10 +482,10 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    sinatra (2.1.0)
+    sinatra (2.2.0)
       mustermann (~> 1.0)
       rack (~> 2.2)
-      rack-protection (= 2.1.0)
+      rack-protection (= 2.2.0)
       tilt (~> 2.0)
     spring (2.1.1)
     sprockets (3.7.2)