Fix wasm target

Cargo.lock

@@ -827,8 +827,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "418d37c8b1d42553c93648be529cb70f920d3baf8ef469b74b9638df426e0b4c"
 dependencies = [
  "cfg-if 1.0.0",
+ "js-sys",
  "libc",
  "wasi",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -1067,6 +1069,7 @@ dependencies = [
  "bracket-lib",
  "console_error_panic_hook",
  "cpal",
+ "getrandom",
  "hecs",
  "instant",
  "oddio",

Cargo.toml

@@ -24,6 +24,7 @@ console_error_panic_hook = "0.1.7"
 wasm-bindgen = "0.2.79"
 instant = "0.1.12"
 rand = "0.8.5"
+getrandom = { version = "0.2.4", features = ["js"] }
 
 [target.'cfg(windows)'.build-dependencies]
 winres = "0.1.12"