fix: fix tests and add Makefile

evm_client/Cargo.toml

@@ -25,6 +25,8 @@ k256 = { version = "0.13", features = ["ecdsa"] }
 [dev-dependencies]
 wasm-bindgen-test = "0.3"
 web-sys = { version = "0.3", features = ["console"] }
+tempfile = "3"
+kvstore = { path = "../kvstore" }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }