Merge pull request #35 from Workiva/widen_fixnum_protobuf_ranges

Widen ranges of fixnum and protobuf

Author: rmconsole7-wk

pubspec.yaml

@@ -7,10 +7,10 @@ environment:
   sdk: ">=2.11.0 <3.0.0"
 
 dependencies:
-  fixnum: ^0.10.0
+  fixnum: '>=0.10.0 <2.0.0'
   http: ^0.12.0
   logging: '>=0.11.4 <2.0.0'
-  protobuf: ^1.1.0
+  protobuf: '>=1.1.0 <3.0.0'
 
 dev_dependencies:
   mockito: ^5.0.7