Add use_null_aware_elements to recommended

Closes #899

Bump to a feature release.
Drop an unnecessary `-0` suffix on the SDK constraint.

Author: natebosch

pkgs/lints/CHANGELOG.md

@@ -1,7 +1,11 @@
-## 6.0.1-wip
+## 6.1.0-wip
 
+- `recommended`:
+  - added [use_null_aware_elements] (https://github.com/dart-lang/core/issues/899)
 - Run `dart format` with the new style.
 
+[use_null_aware_elements]: https://dart.dev/lints/use_null_aware_elements
+
 ## 6.0.0
 
 - `core`:

pkgs/lints/lib/recommended.yaml

@@ -65,5 +65,6 @@ linter:
     - unnecessary_to_list_in_spreads
     - unnecessary_underscores
     - use_function_type_syntax_for_parameters
+    - use_null_aware_elements
     - use_rethrow_when_possible
     - use_super_parameters

pkgs/lints/pubspec.yaml

@@ -1,5 +1,5 @@
 name: lints
-version: 6.0.1-wip
+version: 6.1.0-wip
 description: >
   Official Dart lint rules. Defines the 'core' and 'recommended' set of lints
   suggested by the Dart team.
@@ -11,7 +11,7 @@ topics:
   - lints
 
 environment:
-  sdk: ^3.8.0-0
+  sdk: ^3.8.0
 
 # NOTE: Code is not allowed in this package - do not add dependencies.
 # dependencies: