Test collect_str and let it use the default implementation

[webmaster128]

cc @CyberHoward @hashedone

[CyberHoward]

I remember adding the collect_str because the semver serialization didn't work (https://github.com/dtolnay/semver/blob/master/src/serde.rs).

Was there an update to the default implementation in that time?

[webmaster128]

I remember adding the collect_str because the semver serialization didn't work (https://github.com/dtolnay/semver/blob/master/src/serde.rs).

In #51 you removed an unreachable and added the implementation that is the default implementation of that function. This default implementation probably existed all the time but it was overridden by the panic.

[CyberHoward]

Whoeps, sorry for that!