stable null safety release (dart-archive/cli_util#56)

Author: jakemac53

pkgs/cli_util/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.3.0
+
+- Stable null safety release.
+
 ## 0.3.0-nullsafety.0
 
 - Updated to support 2.12.0 and null safety.

pkgs/cli_util/pubspec.yaml

@@ -1,15 +1,15 @@
 name: cli_util
-version: 0.3.0-nullsafety.0
+version: 0.3.0
 description: A library to help in building Dart command-line apps.
 homepage: https://github.com/dart-lang/cli_util
 
 environment:
   sdk: '>=2.12.0-0 <3.0.0'
 
 dependencies:
-  meta: ^1.3.0-nullsafety
-  path: ^1.8.0-nullsafety
+  meta: ^1.3.0
+  path: ^1.8.0
 
 dev_dependencies:
-  pedantic: ^1.10.0-nullsafety
-  test: ^1.16.0-nullsafety
+  pedantic: ^1.10.0
+  test: ^1.16.0