Repo: _createReleaseBranch() must be async

generateArtifacts() can be async, so _createReleaseBranch() must be async.

Author: scottgonzalez

lib/repo.js

@@ -148,7 +148,7 @@ Release.define({
 		console.log( "After the release, the version will be " + Release.nextVersion.cyan + "." );
 	},
 
-	_createReleaseBranch: function() {
+	_createReleaseBranch: function( fn ) {
 		var json;
 
 		Release.chdir( Release.dir.repo );
@@ -167,7 +167,10 @@ Release.define({
 		});
 		Release.writePackage( json );
 
-		Release.generateArtifacts( Release._createTag );
+		Release.generateArtifacts(function( paths ) {
+			Release._createTag( paths );
+			fn();
+		});
 	},
 
 	_createTag: function( paths ) {