support wasm build by activating getrandom js feature

Author: RCasatta

Cargo.toml

@@ -30,6 +30,9 @@ serde_json = { version = "1.0", optional = true }
 
 actual-serde = { package="serde", version = "1.0.103", features=["derive"], optional = true }
 
+[target.wasm32-unknown-unknown.dev-dependencies]
+getrandom = { version = "0.2", features = ["js"] }
+
 [dev-dependencies]
 rand = "0.8"
 rand_chacha = "0.3"