Fixes postpublish script

Bumps version

Fixes compilation errors

Adds graceful-fs into resolutions

Increase version

Rollback PR #70

Upgrades Yarn 2 to latest version, moves pm field to the top

Bumps major version, removes 4.x mocha version from supported list

Damn npm! remove gitbook-plugin-github

Migrate away from deprecated function calls (#59)

* Migrate away from deprecated function calls

* Remove unnecessary function wrapping