`as` prop does not take precedence over components

[IanVS]

As seen in #87 (comment), as does not take precedence over render if the value provided to it is a component rather than an element.

The snapshot generated in #87 is not correct, and should be fixed.

[bluebill1049]

Thank you very much @IanVS sorry for the delay response. Merged and released.

[IanVS]

The PR mentioned above #87 does not fix this issue, it was spawned from that PR, but a new PR is needed. https://github.com/react-hook-form/error-message/pull/87/files/f0d5c51b3d04006eaa6bf19ed7224a312cbdb0f6#r762061758

I think this should be re-opened.