upgrade eslint and body-parser packages. fix lint errors

lib/index.js

@@ -1,8 +1,6 @@
 'use strict';
 
 const path = require('path');
-const fileFactory = require('./fileFactory');
-const processNested = require('./processNested');
 const processMultipart = require('./processMultipart');
 const isEligibleRequest = require('./isEligibleRequest');
 const { buildOptions, debugLog } = require('./utilities');

package.json

@@ -29,9 +29,9 @@
   "license": "MIT",
   "repository": "richardgirges/express-fileupload",
   "devDependencies": {
-    "body-parser": "^1.18.3",
+    "body-parser": "^1.19.0",
     "coveralls": "^3.0.2",
-    "eslint": "^5.9.0",
+    "eslint": "^6.8.0",
     "express": "^4.16.3",
     "istanbul": "^0.4.5",
     "mocha": "^5.2.0",