Update .jshintrc (#45)

XhmikosR · web-flow · commit a563bc726729 · 2019-10-10T12:42:14.000+03:00
Use `esversion: 6` instead of the deprecated `esnext` option.
diff --git a/.jshintrc b/.jshintrc
@@ -3,7 +3,7 @@
   "curly": true,
   "eqeqeq": true,
   "eqnull": true,
-  "esnext": true,
+  "esversion": 6,
   "immed": true,
   "latedef": true,
   "newcap": true,
