fix: ignored config parameter issue

# Ignored Escaping options bugfix

Hi Sheperdwind

There is a bug inside the constructor for the Compile object, in which **the config parameter object is "ignored"** and not used to extend the original this.config object.

The consequences are that the escape and **unescape options** in the config **doesn't work** ( because they never are updated ).

The fix was made inside the file **src/compile/index.js** line 11

changing ``utils.mixin(config, config);`` with ``utils.mixin(this.config, config);``

Greets

cabumtz