Merge pull request #68 from Workiva/batch/fedx/newer_build_dev_deps

Allow newer build dependencies

Author: rmconsole6-wk

pubspec.yaml

@@ -14,6 +14,6 @@ dependencies:
 dev_dependencies:
   build_runner: '>=1.7.1 <3.0.0'
   build_test: ^2.0.0
-  build_web_compilers: ^2.5.1
+  build_web_compilers: '>=2.5.1 <4.0.0'
   test: ^1.15.7
   workiva_analysis_options: ^1.0.0