Fix component prop type validation to use elementType

[cheets]

Fix #320.

[guillaumechervetaxa]

Hi @cheets , I think that @youf-olivier fixed it also in #314

but I do not know why, he do not merge it.

[cheets]

Hi, yeah I see he did some changes, the commit name was a bit misleading there so couldn't find it at first. I would still recommend using elementType instead of oneOfType([PropTypes.node, PropTypes.func]) if you take a look behind the reasoning in prop-types repository PR.

Also at least OidcRoutes.js isn't fixed in #314.

[youf-olivier]

I just merged It, but I just wanted to fixed errors for pure Components. Youre solution seems better :)

I Think it's a Good PR, you just have to fix these conflicts.

[youf-olivier]

Thanks !!