Feature version update (#106)

* fix(npm): prefer yarn

* fix(nvm): prefer node 12

* feat(not): adds @heythisispaul not feature - ignores specified files

[version] major version; no bool for bool args (#82)

[version] major release; fail if es arg is not matched; thanks @@bran…

…donocasey (#68)

[version] major version bump; see readme; thanks @brandonocasey (#63)

[version] adds verbose msgs feature; thanks @brandonocasey 🎉 (#60)

[version] module flag support feature; thanks @jeffbski 🎉 (#56)

[update] code style: tweaks + docs (#53)

* [update] adds code style tweaks

* [update] adds docs—whoops