contracts: Validate code before deployment (#2330)

* Validate module before storing it in code_cache.

* Bump version.

substrate/node/runtime/wasm/Cargo.toml

@@ -12,7 +12,10 @@ crate-type = ["cdylib"]
 node-runtime = { path = "..", default-features = false }
 
 [features]
-default = []
+default = ["core"]
+core = [
+	"node-runtime/core",
+]
 std = [
 	"node-runtime/std",
 ]