Does not build on wasm32

This is a dupe of https://github.com/fastly/cli/issues/532#issuecomment-1032492496, but the fix lies in either this package or gethostname

My Rust app uses v0.3.2 of tracing-bunyan-formatter and it fails to build for target wasm32-unknown-unknown:

Compiling gethostname v0.2.2
error[E0433]: failed to resolve: could not find `unix` in `os`
  --> /Users/cpete0624/.cargo/registry/src/github.com-1ecc6299db9ec823/gethostname-0.2.2/src/lib.rs:65:18
   |
65 |     use std::os::unix::ffi::OsStringExt;
   |                  ^^^^ could not find `unix` in `os`

error[E0432]: unresolved import `libc::_SC_HOST_NAME_MAX`
  --> /Users/cpete0624/.cargo/registry/src/github.com-1ecc6299db9ec823/gethostname-0.2.2/src/lib.rs:64:33
   |
64 |     use libc::{c_char, sysconf, _SC_HOST_NAME_MAX};
   |                                 ^^^^^^^^^^^^^^^^^ no `_SC_HOST_NAME_MAX` in the root

error[E0425]: cannot find function `gethostname` in crate `libc`
  --> /Users/cpete0624/.cargo/registry/src/github.com-1ecc6299db9ec823/gethostname-0.2.2/src/lib.rs:70:37
   |
70 |     let returncode = unsafe { libc::gethostname(buffer.as_mut_ptr() as *mut c_char, buffer.len()) };
   |                                     ^^^^^^^^^^^ not found in `libc`
   |
help: consider importing this function
   |
27 | use crate::gethostname;
   |

   Compiling tracing-log v0.1.2
error[E0599]: no function or associated item named `from_vec` found for struct `OsString` in the current scope
  --> /Users/cpete0624/.cargo/registry/src/github.com-1ecc6299db9ec823/gethostname-0.2.2/src/lib.rs:89:15
   |
89 |     OsString::from_vec(buffer)
   |               ^^^^^^^^ function or associated item not found in `OsString`
   |
   = help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
   |
27 | use std::os::wasi::ffi::OsStringExt;
   |

Some errors have detailed explanations: E0425, E0432, E0433, E0599.
For more information about an error, try `rustc --explain E0425`.
error: could not compile `gethostname` due to 4 previous errors
warning: build failed, waiting for other jobs to finish...
error: build failed.

Reproduce the build for the wasm32-unknown-unknown target using tracing-bunyan-formatter v0.3.2 and inspect the gethostname v0.2.2 source path shown in the compiler errors. Determine whether the compatibility change belongs in this package or gethostname; done means the Rust app builds successfully for wasm32 without these errors.