Bump rack from 2.0.5 to 2.1.4.3

Bumps [rack](https://github.com/rack/rack) from 2.0.5 to 2.1.4.3.
- [Release notes](https://github.com/rack/rack/releases)
- [Changelog](https://github.com/rack/rack/blob/main/CHANGELOG.md)
- [Commits](rack/rack@2.0.5...v2.1.4.3)

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

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

Gemfile.lock

@@ -15,24 +15,31 @@ GEM
       public_suffix (>= 2.0.2, < 4.0)
     coderay (1.1.2)
     docile (1.1.5)
+    ffi (1.12.2-java)
     json (2.1.0)
     json (2.1.0-java)
     launchy (2.4.3)
       addressable (~> 2.3)
+    launchy (2.4.3-java)
+      addressable (~> 2.3)
+      spoon (~> 0.0.1)
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
     minitest (5.11.3)
     public_suffix (3.0.3)
     puma (3.12.0)
-    rack (2.0.5)
+    puma (3.12.0-java)
+    rack (2.1.4.3)
     rake (12.3.0)
     rdoc (6.0.1)
     simplecov (0.15.1)
       docile (~> 1.1.0)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
+    spoon (0.0.6)
+      ffi
 
 PLATFORMS
   java