PrimeReact input events are not compatible with React forms libraries

[rodriguezc]

I'm submitting a ...

[ ] bug report
[ x] feature request
[ ] support request

Plunkr Case (Bug Reports)
See Prime React Show Case in the project PR.

Current behavior
Forms libraries like Formik provides a global onChange and onBlur handler in order to manage the form state.
Some Prime React components don't provides a "standard" event object (with e.target.*)

Expected behavior
onChange events must provide a standard event

Minimal reproduction of the problem with instructions

Please tell us about your environment:
N/A

• React version:
  Current Prime React version
• PrimeReact version:
  Current Prime React version

[cagataycivici]

PR merged, thank you.