Bump sinatra from 4.1.1 to 4.2.0

Bumps [sinatra](https://github.com/sinatra/sinatra) from 4.1.1 to 4.2.0.
- [Changelog](https://github.com/sinatra/sinatra/blob/main/CHANGELOG.md)
- [Commits](sinatra/sinatra@v4.1.1...v4.2.0)

---
updated-dependencies:
- dependency-name: sinatra
  dependency-version: 4.2.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -1,15 +1,15 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    base64 (0.2.0)
+    base64 (0.3.0)
     flickraw (0.9.10)
     json (2.9.1)
-    logger (1.6.5)
-    mustermann (3.0.3)
+    logger (1.7.0)
+    mustermann (3.0.4)
       ruby2_keywords (~> 0.0.1)
     power_assert (2.0.5)
-    rack (3.1.16)
-    rack-protection (4.1.1)
+    rack (3.2.3)
+    rack-protection (4.2.0)
       base64 (>= 0.1.0)
       logger (>= 1.6.0)
       rack (>= 3.0.0, < 4)
@@ -20,16 +20,16 @@ GEM
       rack (>= 1.3)
     rake (13.2.1)
     ruby2_keywords (0.0.5)
-    sinatra (4.1.1)
+    sinatra (4.2.0)
       logger (>= 1.6.0)
       mustermann (~> 3.0)
       rack (>= 3.0.0, < 4)
-      rack-protection (= 4.1.1)
+      rack-protection (= 4.2.0)
       rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
     test-unit (3.6.7)
       power_assert
-    tilt (2.6.0)
+    tilt (2.6.1)
 
 PLATFORMS
   arm64-darwin-24