bump version to v2.0.0-beta.4

bump version to v2.0.0-alpha.3

bump version to 2.0.0-alpha.2

use draft instead of pre-release for manual dispatches of release wor…

…kflow

set version 2.0.0-alpha.0

add workflow to create release for macOS

fix release script

following the change of electron-pacakger

bump up version to 1.2.0

exclude test directory from npm package

bump up version to 1.1.1