Updated “devDependencies” versions to fix vulnerability alerts
Dropped support of io.js and node.js v0.12.x and lower since new versions of
“devDependencies” couldn’t work with those old node.js versions
(minimal supported version of node.js now is v4.0.0)
v0.5.1
Fix prototype pollution vulnerability (thanks to @mwakerman for the PR)
Avoid using deprecated Buffer API (thanks to @ChALkeR for the PR)
v0.5.0
Auto-testing provided by Travis CI;
Support older Node.JS versions (v0.11.x and v0.10.x);