Don't pass argument to Resolvers that has been removed

Closes #131

Author: natebosch

pubspec.yaml

@@ -1,5 +1,5 @@
 name: build
-version: 0.4.1+2
+version: 0.4.2-dev
 description: A build system for Dart.
 author: Dart Team <[email protected]>
 homepage: https://github.com/dart-lang/build
@@ -10,7 +10,7 @@ environment:
 dependencies:
   analyzer: ">=0.27.1 <0.30.0"
   barback: ^0.15.0
-  code_transformers: ">=0.4.1 <0.6.0"
+  code_transformers: ">=0.4.2+3 <0.6.0"
   crypto: ">=0.9.2 <3.0.0"
   logging: ^0.11.2
   glob: ^1.1.0

test/analyzer/resolver_test.dart

@@ -18,8 +18,7 @@ import '../common/common.dart';
 class ResolversSpy implements Resolvers {
   code_transformers.Resolver lastResolved;
   static final code_transformers.Resolvers _resolvers =
-      new code_transformers.Resolvers(code_transformers.dartSdkDirectory,
-          useSharedSources: true);
+      new code_transformers.Resolvers(code_transformers.dartSdkDirectory);
 
   @override
   Future<Resolver> get(BuildStep buildStep, List<AssetId> entryPoints,