fix deprecated library hint

Author: jakemac53

lib/src/analyzer/resolver.dart

@@ -4,8 +4,8 @@
 import 'dart:async';
 
 import 'package:analyzer/analyzer.dart' show Expression;
+import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/generated/constant.dart' show EvaluationResult;
-import 'package:analyzer/src/generated/element.dart';
 import 'package:code_transformers/resolver.dart' as code_transformers
     show Resolver;
 import 'package:source_maps/refactor.dart';

tool/travis.sh

@@ -10,7 +10,7 @@ set -e
 # Verify that the libraries are error free, requires some strong mode changes
 # that are only in the dev channel right now though.
 if [ "$TRAVIS_DART_VERSION" != "stable" ]; then
-  dartanalyzer --fatal-warnings lib/build.dart
+  dartanalyzer --fatal-warnings lib/build.dart build_test/lib/build_test.dart
 fi
 
 # Run the tests.