Bump the sass_api version (#2044)

Author: nex3

pkg/sass_api/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 7.2.1
+
+* No user-visible changes.
+
 ## 7.2.0
 
 * No user-visible changes.

pkg/sass_api/pubspec.yaml

@@ -2,7 +2,7 @@ name: sass_api
 # Note: Every time we add a new Sass AST node, we need to bump the *major*
 # version because it's a breaking change for anyone who's implementing the
 # visitor interface(s).
-version: 7.2.0
+version: 7.2.1
 description: Additional APIs for Dart Sass.
 homepage: https://github.com/sass/dart-sass