build(deps): update near-sdk to 4.1.0 (#40)

Author: mooori

Cargo.toml

@@ -22,8 +22,7 @@ keywords = ["near", "smart contract", "plugin"]
 
 [workspace.dependencies]
 bitflags = "1.3"
-# Feature `unstable` is required to use `near_sdk::store`.
-near-sdk = { version = "4.0.0", features = ["unstable"] }
+near-sdk = "4.1.0"
 near-plugins-derive = { path = "near-plugins-derive" }
 serde = "1"
 anyhow = "1.0"