Fix/event handler hook (nodegui#101)

* Typed useEventHandler

* bump version

upgrades react-nodegui to 0.3.2

bump patch version

bump to 0.3.0

simplify central widget window (nodegui#73)

* cleans up custom central widget logic

* bumps version to 0.2.6

added echoMode property to LineEdit (nodegui#68)

remove sourcemaps

bump version for bug-fixes

Merge pull request nodegui#53 from nodegui/update-docs

update docs regarding the starter project

Merge pull request nodegui#33 from nodegui/all-contributors/add-nates…

…hmbhat

docs: add nateshmbhat as a contributor