Merge pull request javascript-obfuscator#448 from javascript-obfuscat…

…or/bug/chalk-requires-node-8

Dependency Chalk.js requires Node.js version 8 now

Updated CHANGELOG.md

0.18.5 version. Dependencies update

0.18.4 version

Updated travis CS node versions

0.18.1 version

0.18.0 version

Merge pull request javascript-obfuscator#304 from tyronedougherty/master

Correct the ObfuscationResult type

0.17.3 version

Fixed readme javascript-obfuscator#299