Add missing package_config dep (#1286)

Author: jathak

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.32.10
+
+* No user-visible changes.
+
 ## 1.32.9
 
 * Fix a typo in a deprecation warning.

pubspec.yaml

@@ -1,5 +1,5 @@
 name: sass
-version: 1.32.9
+version: 1.32.10
 description: A Sass implementation in Dart.
 author: Sass Team
 homepage: https://github.com/sass/dart-sass
@@ -20,6 +20,7 @@ dependencies:
   meta: ^1.3.0
   node_interop: ^2.0.0
   js: ^0.6.3
+  package_config: ^2.0.0
   path: ^1.8.0
   source_maps: ^0.10.10
   source_span: ^1.8.1