Bump slang from 4.1.0 to 4.2.1

Bumps [slang](https://github.com/slang-i18n/slang) from 4.1.0 to 4.2.1.
- [Release notes](https://github.com/slang-i18n/slang/releases)
- [Commits](https://github.com/slang-i18n/slang/commits)

---
updated-dependencies:
- dependency-name: slang
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pubspec.lock

@@ -862,26 +862,26 @@ packages:
     dependency: "direct main"
     description:
       name: slang
-      sha256: b04db2dbaf927b28600a2f8a272a3bf2ae309556dcc5d6beb02d66af0be39e4c
+      sha256: "0af2983d4863f9b57f7a28f47fdd86df4ada462e1fad727b47e6bf5fc64d0060"
       url: "https://pub.dev"
     source: hosted
-    version: "4.1.0"
+    version: "4.2.1"
   slang_build_runner:
     dependency: "direct dev"
     description:
       name: slang_build_runner
-      sha256: "6338653769ab088ad222e84b1f382fffb867a9a3ead802960aa4d0ab45a62f5f"
+      sha256: "2c0f2790ad0f68210c151fefee86b863c483f315816cbe59496dbbe744ef90e2"
       url: "https://pub.dev"
     source: hosted
-    version: "4.1.0"
+    version: "4.2.0"
   slang_flutter:
     dependency: "direct main"
     description:
       name: slang_flutter
-      sha256: "59988f37bb8b50d96ee46832a8a389036c0da26c04b1b1d4aa6690c00f70eccf"
+      sha256: "1693804c4c16a14134e753e48e488dca6a86ad682d5faf3c9c53e80b7b2e6b49"
       url: "https://pub.dev"
     source: hosted
-    version: "4.1.0"
+    version: "4.2.0"
   source_gen:
     dependency: transitive
     description:

pubspec.yaml

@@ -22,7 +22,7 @@ dependencies:
   markdown_widget: ^2.3.2+3
   riverpod_annotation: ^2.6.1
   shared_preferences: ^2.3.3
-  slang: ^4.1.0
+  slang: ^4.2.1
   slang_flutter: ^4.1.0
   url_launcher: ^6.3.1