Support latest build_web_compliers across all packages

Author: kevmoo

dwds/pubspec.yaml

@@ -25,6 +25,6 @@ dependencies:
 dev_dependencies:
   args: ^1.0.0
   build_runner: ^1.0.0
-  build_web_compilers: ^1.0.0
+  build_web_compilers: '>=1.0.0 <3.0.0'
   test: ^1.6.0
   webdriver: ^2.0.0

example/pubspec.yaml

@@ -6,4 +6,4 @@ environment:
 
 dev_dependencies:
   build_runner: '>=1.3.0 <2.0.0'
-  build_web_compilers: ^1.0.0
+  build_web_compilers: '>=1.0.0 <3.0.0'

webdev/pubspec.yaml

@@ -37,7 +37,7 @@ dev_dependencies:
   build: ^1.0.0
   build_runner: ^1.0.0
   built_value_generator: ^6.4.0
-  build_web_compilers: ^1.0.0
+  build_web_compilers: '>=1.0.0 <3.0.0'
   build_verify: ^1.0.0
   build_version: ^2.0.0
   graphs: ^0.2.0