required tag is not validating interface with nil value

[oshankkumar]

Bug Report

Q	A
Version(s)	v0.0.0-20200428143746-21a406dcc535

Summary

required tag is not validating interface with nil value

Current behavior

How to reproduce

Add required tag on a field of interface type

Expected behavior

required tag should report error if field is of interface kind with nil value

[sergeyglazyrindev]

Hello guys!
I forked this package cause owner disappeared. Hope, he will be back, but it would be easier to merge these changes back if he is back
Link to my repo: create issue there and we'll discuss it.