Feature Request: phone number parsing from E.164

[skaaptjop]

It would be handy to have the tag code strip out the + symbl from E.164 provided phone numbers before hashing.
My rationale is as follows.

The Conversions API wants us to provide phone numbers hashed from a digits-only version e.g.

Example:
Input: US phone number (650)555-1212
Normalized format: 16505551212

but the common event data model expects E.164 format with the + symbol included.

This means that when we push data around the datalayer, event parameters etc. we need to have a custom variable that formats the number for the Conversion API alone adding in unnecessary steps.