Enable min/max validators to parse date fields
Enable min/max validators to parse date fields

The min/max validators have been overloaded to work with the following field types:

- datetime
- date
- week
- month

These field types accept string values which are always string comparable, e.g. '0100-W20' < '1000-W11' for type week.

I've opted into simply checking whether min/max is parsable as a number instead of inspecting the vnode to see if the type of input is `number` for simplicity.

fergaldoyle/vue-form,fergaldoyle/vue-form