Merge pull request javascript-obfuscator#130 from javascript-obfuscat…

…or/0.12.3-release

Fixed javascript-obfuscator#129

Merge pull request javascript-obfuscator#124 from javascript-obfuscat…

…or/0.12.2

Updated change log for 0.12.2 version

Merge pull request javascript-obfuscator#118 from javascript-obfuscat…

…or/0.12.1-release

0.12.1 release

0.12.0 release

Fixed javascript-obfuscator#98

0.11.1 release

Refactoring of Obfuscator class

Types refactoring

Fixed processing of `null` value in NodeUtils.clone() method

Fixed require of external user config file javascript-obfuscator#2