Address the typemap warning

[estk]

warning: the trait `typemap::CloneAny` cannot be made into an object
  |
  = note: `#[warn(where_clauses_object_safety)]` on by default
  = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
  = note: for more information, see issue #51443 <https://github.com/rust-lang/rust/issues/51443>
  = note: method `clone_any_send` references the `Self` type in where clauses

[calvinbrown085]

@estk Where is the code associated with these warnings?

[estk]

@calvinbrown085 I get the warning on the first line of src/lib, it is from the typemap crate. However, after a bit more research, it seems that maybe this warning will go away at some point..

See:
reem/rust-typemap#44
rust-lang/rust#51443

[estk]

We could steal this:
https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=57be6b5552a356035374b474df3fd901

from here:
http-rs/tide#5

implemented here:
http-rs/tide#109

[estk]

I dont see this error anymore