Update packages (microsoft#1631)

Change docs for react-native@0.59 (microsoft#1545)

Handle codepush.json parsing exception (microsoft#1540)

Fixed Apple Developer Program License Agreement link (microsoft#1502)

Fix ios postlink (microsoft#1482)

[Feature] Re-try mechanism for CodePush Rollbacks (microsoft#1467)

Bump for new version 5.4.2

* Added items in .npmignore

Bumped code-push version (microsoft#1365)

Update compatibility table. (microsoft#1344)

Get update folder method (microsoft#1323)

* Exposed current update path.

* Check for null

* API reference update