v1.21.0

DEPENDENCY UPDATES

Bump webpack from 3.3.9 to 4.41.5
Bump http-server from 0.11.1 to 0.12.1
Bump chromedriver from 78.0.1 to 79.0.3
Bump file-loader from 4.2.0 to 5.0.2
Bump nightwatch from 1.2.4 to 1.3.4