Add resolver tests to tests_all.dart (dart-archive/coverage#206)

Author: cbracken

pkgs/coverage/test/test_all.dart

@@ -3,13 +3,15 @@ import 'package:test/test.dart';
 import 'collect_coverage_api_test.dart' as collect_coverage_api;
 import 'collect_coverage_test.dart' as collect_coverage;
 import 'lcov_test.dart' as lcov;
+import 'resolver_test.dart' as resolver;
 import 'run_and_collect_test.dart' as run_and_collect;
 import 'util_test.dart' as util;
 
 void main() {
   group('collect_coverage_api', collect_coverage_api.main);
   group('collect_coverage', collect_coverage.main);
   group('lcov', lcov.main);
+  group('resolver', resolver.main);
   group('run_and_collect', run_and_collect.main);
   group('util', util.main);
 }