hotfix: update mason version

Author: DemeoStep

bricks/flutter_clean_base/brick.yaml

@@ -9,7 +9,7 @@ version: 0.1.2+3
 # The following defines the environment for the current brick.
 # It includes the version of mason that the brick requires.
 environment:
-  mason: ">=0.1.0-dev.26 <0.1.0"
+  mason: "^0.1.0"
 
 # Variables specify dynamic values that your brick depends on.
 # Zero or more variables can be specified for a given brick.