Support the latest version of pkg/cli_util (#168)

Remove redundant (and deprecated) import in test

Author: kevmoo

pubspec.yaml

@@ -13,7 +13,7 @@ dependencies:
 dev_dependencies:
   build_runner: ^0.3.2
   build_test: ^0.6.0
-  cli_util: ^0.0.1
+  cli_util: '>=0.0.1 <0.2.0'
   collection: ^1.1.2
   mockito: '>=0.11.0 <3.0.0'
   test: ^0.12.3

test/builder_test.dart

@@ -7,7 +7,6 @@ import 'dart:async';
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:build_test/build_test.dart';
-import 'package:source_gen/builder.dart';
 import 'package:source_gen/source_gen.dart';
 import 'package:test/test.dart';