Cast value correctly in putIfAbsentAsync (#1404)

* Cast value correctly in `putIfAbsentAsync`

Fixes #1403

* Update pubspec.yaml

* Update CHANGELOG.md

Co-authored-by: Jennifer Thakar <[email protected]>

Author: Rafer45

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.35.3
+
+* No user-facing changes.
+
 ## 1.35.2
 
 * **Potentially breaking bug fix**: Properly throw an error for Unicode ranges

lib/src/utils.dart

@@ -369,7 +369,7 @@ Future<Iterable<F>> mapAsync<E, F>(
 /// same key.
 Future<V> putIfAbsentAsync<K, V>(
     Map<K, V> map, K key, Future<V> ifAbsent()) async {
-  if (map.containsKey(key)) return map[key]!;
+  if (map.containsKey(key)) return map[key] as V;
   var value = await ifAbsent();
   map[key] = value;
   return value;

pubspec.yaml

@@ -1,5 +1,5 @@
 name: sass
-version: 1.35.2
+version: 1.35.3-dev
 description: A Sass implementation in Dart.
 author: Sass Team
 homepage: https://github.com/sass/dart-sass