Bump sinatra from 2.2.0 to 3.0.4

Bumps [sinatra](https://github.com/sinatra/sinatra) from 2.2.0 to 3.0.4.
- [Release notes](https://github.com/sinatra/sinatra/releases)
- [Changelog](https://github.com/sinatra/sinatra/blob/master/CHANGELOG.md)
- [Commits](sinatra/sinatra@v2.2.0...v3.0.4)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -136,7 +136,7 @@ GEM
     minitest (5.15.0)
     msgpack (1.4.5)
     multipart-post (2.1.1)
-    mustermann (1.1.1)
+    mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     net-imap (0.2.3)
       digest
@@ -162,8 +162,8 @@ GEM
     puma (5.6.4)
       nio4r (~> 2.0)
     racc (1.6.1)
-    rack (2.2.3.1)
-    rack-protection (2.2.0)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -241,10 +241,10 @@ GEM
       sinatra
     ruby_event_store-rspec (2.3.0)
       rspec (~> 3.0)
-    sinatra (2.2.0)
-      mustermann (~> 1.0)
-      rack (~> 2.2)
-      rack-protection (= 2.2.0)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
       tilt (~> 2.0)
     slack-ruby-client (1.0.0)
       faraday (>= 1.0)
@@ -262,7 +262,7 @@ GEM
     strscan (3.0.1)
     thor (1.2.1)
     thread_safe (0.3.6)
-    tilt (2.0.10)
+    tilt (2.0.11)
     timeout (0.2.0)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)