Protect `assert_impl_any!` against false positives
Protect `assert_impl_any!` against false positives

An attacker could have a blanket-impl'd trait in scope that has a
`_static_assertions_impl_any` method which interferes with that method
of `Wrapper`. This was pointed out by @Lej77.

See https://github.com/nvzqz/static-assertions-rs/issues/19.

nvzqz/static-assertions-rs