ngx-chips: Problem with separatorKeys and separatorKeyCodes

I’m submitting a … (check one with “x”)

[ x ] bug report => search github for a similar issue or PR before submitting
[ ] feature request
[ ] support request/question

Current behavior separatorKeyCodes or separatorKeys not working when manually adding keycodes/strings

Expected behavior The new keycodes/strings would be registered and using the desired keys could separate between tags

Minimal reproduction of the problem with instructions (if applicable) Trying any tag-input in code?

What is the motivation / use case for changing the behavior? (if applicable) So the tag input can use more than one key to separate between tags

What do you use to build your app? (SystemJS, Webpack, angular-cli, etc.). Please specify the version angular-cli version: 1.0.2

Angular version: 4.1.3

ng2-tag-input version: 1.2.9

Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ] all