add underscore to _requireCompletionOf

Updated CHANGELOG for v2.2.2

Prep for v2.1.1 release

issue/1582: _canNavigate after router:navigate (adaptlearning#1688)

* issue/1582: _canNavigate after router:navigate

* issue/1582: removed variable caching

* issue/1582: removed whitespace

release notes for 2.1.3

issue/1577: fix handlebars filter for windows (adaptlearning#1578)

2.1.1 release notes

amend release note for adaptlearning#695

CHANGELOG updated for v2.0.19

added changes for 2.0.18