chore: allow latest stack_track package

Author: kevmoo

pubspec.yaml

@@ -1,8 +1,7 @@
 name: angular
 environment:
- sdk: '>=1.9.0-dev.8.0 <2.0.0'
+ sdk: '>=1.9.0 <2.0.0'
 dependencies:
- stack_trace: '>=1.1.1 <1.2.0'
-
+ stack_trace: '^1.1.1'
 dev_dependencies:
- guinness: ">=0.1.17 <0.2.0"
+ guinness: '^0.1.17'