Fix build when using the uds feature

[NigelThorpe]

Building swagger 6.2.0 with --all-features or --features uds gives the following:

error[E0261]: use of undeclared lifetime name `'a`
  --> /opt/rust/registry/src/git.datcon.co.uk-91de7a0a7768d16b/swagger-6.2.0/src/composites.rs:51:25
   |
51 | impl HasRemoteAddr for &'a tokio::net::UnixStream {
   |     -                   ^^ undeclared lifetime
   |     |
   |     help: consider introducing lifetime `'a` here: `<'a>`
For more information about this error, try `rustc --explain E0261`.
error: could not compile `swagger` due to previous error

Introduced @ 51c1b3b#diff-ca2bf0c7938022d95aaa8450f19b8e46e33afbbe3dc55d8ea80bcef9a85d4e5aR219