Added references to changelog maker tool and other minor fixes#394

Merged

NickNaso merged 2 commits intonodejs:masterfrom NickNaso:create_release

Jan 8, 2019

+37-16

Commits on Nov 12, 2018

Added references to changelog maker tool and other minor fixes to explain better the process.
NickNaso
committed
Removed 4 and 9 from Node.js version to test on CI
NickNaso
committed