[ES6] Fix the incorrect Node 0.12 end of support date
[ES6] Fix the incorrect Node 0.12 end of support date

The Node.js 0.12 end of support date was moved to the end of 2016 long time ago
because of the EOL of the OpenSSL version used. The comment still mentioned
April 2017.

KTamas/compat-table,mzgol/compat-table,Delapouite/compat-table,Delapouite/compat-table,KTamas/compat-table,mzgol/compat-table