Bump for 0.19.6

0.20.0-beta.2 beta release

Backlevel chromedriver version due to bad semver

Chromedriver 2.41.1 cannot be installed on Node 4.

Update for 0.19.4

fix persistable context handling of sort node & existing error in tes…

…tcases

Bump for 0.19.2

Update for 0.19.1