fix: reference for isModuleMapFileType is incorrect

Author: rosen-vladimirov

lib/pbxProject.js

@@ -35,7 +35,7 @@ var util = require('util'),
     isEntitlementFileType = constants.isEntitlementFileType,
     isAssetFileType = constants.isAssetFileType,
     isPlistFileType = constants.isPlistFileType,
-    isModuleMapFileType = constants.isPlistFileType;
+    isModuleMapFileType = constants.isModuleMapFileType;
 
 function pbxProject(filename) {
     if (!(this instanceof pbxProject))