feat(testing): package angular2_testing to prepare it for publishing

Closes #5682

scripts/publish/pub_publish.sh

@@ -37,3 +37,4 @@ publishModule angular2
 publishModule benchpress
 publishModule benchmarks
 publishModule angular2_material
+publishModule angular2_testing

scripts/publish/pubspec_cleaner.js

@@ -27,4 +27,9 @@ doc['authors'] = Object.keys(BASE_PACKAGE_JSON.contributors).map(function(name)
   return BASE_PACKAGE_JSON.contributors[name];
 });
 
+if (doc['dependencies'] && doc['dependencies']['angular2']) {
+  delete doc['dependencies']['angular2'];
+  doc['dependencies']['angular2'] = BASE_PACKAGE_JSON.version;
+}
+
 fs.writeFileSync(pubspecFile, yaml.safeDump(doc));