Regex validator should accept regex string, not regex object

[idbr]

Regex validator in a kauri form is not working:

+validators: 
{
  required : {},
  regex : { regex: "[1-9][0-9][0-9][0-9]" }
}

It seems the basic regex validator needs a regex object (and not a regex string), which is quite impossible in json as far as I know:

+validators: 
{
  required : {},
  regex : { regex: /[1-9][0-9][0-9][0-9]/ }
}

See attachment for fix

[mpo]

Added automatic string to RegExp? conversion in r1361