No longer compiles on Nightly

[arbarlow]

Unfortunately I think this has crept into nightly recently and now Eyros no longer builds

error[E0407]: method `backtrace` is not a member of trait `std::error::Error`
  --> /Users/alex/.cargo/registry/src/github.com-1ecc6299db9ec823/eyros-4.6.2/src/error.rs:31:3
   |
31 | /   fn backtrace(&'_ self) -> Option<&'_ Backtrace> {
32 | |     Some(&self.backtrace)
33 | |   }
   | |___^ not a member of trait `std::error::Error`

For more information about this error, try `rustc --explain E0407`.
error: could not compile `eyros` due to previous error

[rubillionaire]

this fork has a commit that fixes the issue: barakber@66be9e8

with the commit above i was able to cargo build --features default,wasm

i just asked a potentially related question as to if this repo would see more commits

if anyone else is looking to build the project, i found i had to install an extra cargo install wasm-bindgen-cli in order to make -s wasm-n n="2d". i was then able to copy the outputs to a local node_modules/eyros

cp eyros/pkg/2d.wasm peermaps-web/public/eyros2d.wasm
cp eyros/pkg/lib/2d-api.js peermaps-web/node_modules/eyros/lib/2d-api.js