Commit Cargo.lock to lock Rust deps, and update wasm-bindgen etc

Updating wasm-bindgen fixes #9

Locking like this isn't generally recommended for libraries, but that's
for *Rust* libraries - because we're wasm, we're actually the end
compile step for this code and all deps are effectively devdeps, so
locking these is the correct fix.

Author: pimterry

.gitignore

@@ -105,6 +105,5 @@ dist
 
 # Rust:
 /target
-Cargo.lock
 /pkg
 /pkg.*/