Actually try to minimize the size

Author: alvinhochun

Diff for: Cargo.toml

@@ -4,3 +4,8 @@ members = [
     "dev-server",
     "xtask",
 ]
+
+[profile.release]
+lto = "fat"
+codegen-units = 1
+opt-level = 's'

Diff for: wasm-module/Cargo.toml

@@ -12,11 +12,8 @@ crate-type = ["cdylib"]
 default = ["console_error_panic_hook"]
 
 [dependencies]
-rhai = { version = "0.15", features = [ "only_i64" ] }
+rhai = { version = "0.15", features = [ "only_i64", "no_module", "no_optimize", "unchecked" ] }
 wasm-bindgen = "0.2"
 js-sys = "*"
 
 console_error_panic_hook = { version = "0.1", optional = true }
-
-[profile.release]
-opt-level = 's'