Update package.json

updated configuration  in package.json for publishing v2.0.1 on npm registry

resolves #34

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@farhan7reza7/diff-ymd-package",
+  "name": "diff-ymd-package",
   "version": "2.0.1",
   "description": "A javascript library for calculating the difference between two dates in formatted ways like (aY bM cD)(aYears bMonths cDays) or customized desired formats like aY-bM-cD or aYears-bMonths-cDays or kDays or mWeeks or nMonths etc.",
   "main": "src/diff-ymd.js",