How to make textinput for currency has separator dot/comma ?

[Otik133040040]

Version

Tell us which versions you are using:

• tcomb-form-native v0.6.16
• react-native v0.55.4

Expected behaviour

when user input for currency , textinput automatically has separator dot/comma for format currency

Actual behaviour

when user input for currency , textinput not automatically has separator dot/comma for format currency (on view) but when console.log(value) value already has separator dot/comma