turn on max empty line rule with default of max: 2. (#3176)

Run with fix.

.eslintrc.json

@@ -18,6 +18,7 @@
         "linebreak-style": ["error", "unix"],
         "no-trailing-spaces": 2,
         "eol-last": 2,
-        "space-in-parens": ["error", "never"]
+        "space-in-parens": ["error", "never"],
+        "no-multiple-empty-lines": 1
     }
 }

spec/helper.js

@@ -370,7 +370,6 @@ function mockFacebook() {
 }
 
 
-
 // This is polluting, but, it makes it way easier to directly port old tests.
 global.Parse = Parse;
 global.TestObject = TestObject;

src/Adapters/Storage/Mongo/MongoSchemaCollection.js

@@ -83,7 +83,6 @@ function _mongoSchemaQueryFromNameQuery(name: string, query) {
 }
 
 
-
 // Returns a type suitable for inserting into mongo _SCHEMA collection.
 // Does no validation. That is expected to be done in Parse Server.
 function parseFieldTypeToMongoFieldType({ type, targetClass }) {

src/Routers/IAPValidationRouter.js

@@ -56,7 +56,6 @@ function getFileForProductIdentifier(productIdentifier, req) {
 }
 
 
-
 export class IAPValidationRouter extends PromiseRouter {
 
   handleRequest(req) {