Add lint rule space-infix-ops (#3237)

Disallows: 1+1.  Must be 1 + 1.

src/Adapters/Storage/Mongo/MongoTransform.js

@@ -109,7 +109,7 @@ const transformKeyValueForUpdate = (className, restKey, restValue, parseFormatSc
 }
 
 const transformInteriorValue = restValue => {
-  if (restValue !== null && typeof restValue === 'object' && Object.keys(restValue).some(key => key.includes('$')|| key.includes('.'))) {
+  if (restValue !== null && typeof restValue === 'object' && Object.keys(restValue).some(key => key.includes('$') || key.includes('.'))) {
     throw new Parse.Error(Parse.Error.INVALID_NESTED_KEY, "Nested keys should not contain the '$' or '.' characters");
   }
   // Handle atomic values