Mio & Tokio causing wasm build to fail

[Sam Denty]

I ran into a problem with the crate not compiling, when using it in conjunction with reqwest. I managed to fix it by adding the resolver = "2" to the [package] / [workspace] toml config. Maybe mention this somewhere in the README?

error[E0432]: unresolved import `crate::sys::IoSourceState`
  --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/io_source.rs:12:5
   |
12 | use crate::sys::IoSourceState;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ no `IoSourceState` in `sys`

error[E0432]: unresolved import `crate::sys::tcp`
  --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/net/tcp/listener.rs:15:17
   |
15 | use crate::sys::tcp::{bind, listen, new_for_addr};
   |                 ^^^ could not find `tcp` in `sys`

error[E0432]: unresolved import `crate::sys::tcp`
  --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/net/tcp/stream.rs:13:17
   |
13 | use crate::sys::tcp::{connect, new_for_addr};
   |                 ^^^ could not find `tcp` in `sys`

error[E0433]: failed to resolve: could not find `Selector` in `sys`
   --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/poll.rs:301:18
    |
301 |             sys::Selector::new().map(|selector| Poll {
    |                  ^^^^^^^^ could not find `Selector` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/event/event.rs:24:14
   |
24 |         sys::event::token(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/event/event.rs:38:14
   |
38 |         sys::event::is_readable(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/event/event.rs:43:14
   |
43 |         sys::event::is_writable(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/event/event.rs:68:14
   |
68 |         sys::event::is_error(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
  --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/event/event.rs:99:14
   |
99 |         sys::event::is_read_closed(&self.inner)
   |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/event/event.rs:129:14
    |
129 |         sys::event::is_write_closed(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/event/event.rs:151:14
    |
151 |         sys::event::is_priority(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/event/event.rs:173:14
    |
173 |         sys::event::is_aio(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/event/event.rs:183:14
    |
183 |         sys::event::is_lio(&self.inner)
    |              ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `event` in `sys`
   --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/event/event.rs:221:26
    |
221 |                     sys::event::debug_details(f, self.0)
    |                          ^^^^^ could not find `event` in `sys`

error[E0433]: failed to resolve: could not find `tcp` in `sys`
   --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/net/tcp/listener.rs:103:18
    |
103 |             sys::tcp::accept(inner).map(|(stream, addr)| (TcpStream::from_std(stream), addr))
    |                  ^^^ could not find `tcp` in `sys`

error[E0433]: failed to resolve: could not find `udp` in `sys`
   --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/net/udp.rs:122:14
    |
122 |         sys::udp::bind(addr).map(UdpSocket::from_std)
    |              ^^^ could not find `udp` in `sys`

error[E0433]: failed to resolve: could not find `udp` in `sys`
   --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/net/udp.rs:544:14
    |
544 |         sys::udp::only_v6(&self.inner)
    |              ^^^ could not find `udp` in `sys`

error[E0412]: cannot find type `Selector` in module `sys`
   --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/poll.rs:255:20
    |
255 |     selector: sys::Selector,
    |                    ^^^^^^^^ not found in `sys`

error[E0412]: cannot find type `Selector` in module `sys`
   --> /Users/samdenty/.cargo/registry/src/github.com-1ecc6299db9ec823/mio-0.8.5/src/poll.rs:689:44
    |
689 |     pub(crate) fn selector(&self) -> &sys::Selector {
    |                                            ^^^^^^^^ not found in `sys`