Update pyo3

Author: bilelmoussaoui

Cargo.lock

@@ -17,6 +17,6 @@ crate-type = ["cdylib"]
 
 [dependencies]
 oo7_rs = { package = "oo7", path = "../client", version = "0.6.0-alpha" }
-pyo3 = { version = "0.27", features = ["extension-module", "abi3-py38"] }
-pyo3-async-runtimes = { version = "0.27", features = ["tokio-runtime"] }
+pyo3 = { version = "0.28", features = ["extension-module", "abi3-py38"] }
+pyo3-async-runtimes = { version = "0.28", features = ["tokio-runtime"] }
 tokio = { version = "1", features = ["rt-multi-thread"] }