How to use functions with text-mask

[rodrigopoi]

I'm submitting a

[ ] Bug / Regression
[X] Feature Request / Proposal
[ ] Question

I'm using

NG Dynamic Forms Version: `7.0.1`

[X] Basic UI
[X] Bootstrap UI  
[X] Foundation UI
[X] Ionic UI
[X] Kendo UI
[X] Material  
[X] NG Bootstrap
[X] Prime NG

Description

How to use functions with text-mask?

Example:
https://github.com/text-mask/text-mask/blob/master/componentDocumentation.md#mask

[Karamuto]

Should be resolved when #891 is merged into master and new version is out.