[V1.3] XSS Testing to `in javascript`

[hahwul]

Sample

// [test param on request ]: '+alert(45);//
// [ response ]

var a = 'test'+alert(45);//';

Action

• Add payload(callback class type is selenium)

References https://github.com/hahwul/XSpear/issues/36#issuecomment-569432334 https://github.com/hahwul/XSpear/issues/36#issuecomment-569432470