Bump flutter_lints from 2.0.3 to 3.0.0 in /example (#38)

* Bump flutter_lints from 2.0.3 to 3.0.0 in /example

Bumps [flutter_lints](https://github.com/flutter/packages/tree/main/packages) from 2.0.3 to 3.0.0.
- [Release notes](https://github.com/flutter/packages/releases)
- [Commits](https://github.com/flutter/packages/commits/pigeon-v3.0.0/packages)

---
updated-dependencies:
- dependency-name: flutter_lints
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

* Update deprecated analyzer settings

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Joachim Nohl <43643339+nohli@users.noreply.github.com>

Author: dependabot[bot]

analysis_options.yaml

@@ -1,9 +1,10 @@
 include: package:flutter_lints/flutter.yaml
 
 analyzer:
-  strong-mode:
-    implicit-casts: false
-    implicit-dynamic: false
+  language:
+    strict-casts: true
+    strict-inference: true
+    strict-raw-types: true
   errors:
     todo: info
 linter:

example/analysis_options.yaml

@@ -1,9 +1,10 @@
 include: package:flutter_lints/flutter.yaml
 
 analyzer:
-  strong-mode:
-    implicit-casts: false
-    implicit-dynamic: false
+  language:
+    strict-casts: true
+    strict-inference: true
+    strict-raw-types: true
   errors:
     todo: info
 linter:

example/pubspec.yaml

@@ -13,7 +13,7 @@ dependencies:
     path: ../
 
 dev_dependencies:
-  flutter_lints: ^2.0.0
+  flutter_lints: ^3.0.0
 
 flutter:
   uses-material-design: true