Addressed eslint-issues on boolean-prop-naming.js file

Author: caroline223

lib/rules/boolean-prop-naming.js

@@ -175,7 +175,7 @@ module.exports = {
       let newProptypes = proptypes;
       newProptypes = newProptypes || [];
 
-      newProptypes.forEach((prop) => {
+      (newProptypes || []).forEach((prop) => {
         if (config.validateNested && nestedPropTypes(prop)) {
           runCheck(prop.value.arguments[0].properties, addInvalidProp);
           return;