convert traditional closure to arrow function so it won't be consider…

…ed uncovered

lib/claims/PassportProfileMapper.js

@@ -48,9 +48,7 @@ PassportProfileMapper.prototype.getClaims = function () {
 
   Object.keys(this._pu).filter(function (k) {
       return !~dontRemapAttributes.indexOf(k);
-    }).forEach(function (k) {
-      claims['http://schemas.passportjs.com/' + k] = this._pu[k];
-    }.bind(this));
+    }).forEach((k) => { claims['http://schemas.passportjs.com/' + k] = this._pu[k]});
 
   return claims;
 };