Dist enhancements

Hi, this is the same as [this PR](https://github.com/aanoaa/AnyEvent-HTTP-ScopedClient/pull/3).

Cheers!

P. S.: you may want to remove [AnyEvent::Mypeople::Client](https://metacpan.org/release/AnyEvent-Mypeople-Client) from CPAN because it was renamed, so it want be indexed by MetaCPAN.