Merge pull request #93 from Workiva/widen_http_0.14.4

O11Y-2363: Widen http on 0.14.x line

Author: robbecker-wf

pubspec.yaml

@@ -7,7 +7,7 @@ environment:
 
 dependencies:
   fixnum: '>=0.10.0 <2.0.0'
-  http: ^0.12.0
+  http: '>=0.12.0 <0.14.0'
   logging: '>=0.11.4 <2.0.0'
   protobuf: '>=1.1.0 <3.0.0'