Bumped pyo3 dependency to v0.22.0

Cargo.toml

@@ -22,12 +22,16 @@ num-complex = ">= 0.2, < 0.5"
 num-integer = "0.1"
 num-traits = "0.2"
 ndarray = ">= 0.15, < 0.17"
-pyo3 = { version = "0.21.0", default-features = false, features = ["macros"] }
+pyo3 = { version = "0.22.0", default-features = false, features = ["macros"] }
 rustc-hash = "1.1"
 
 [dev-dependencies]
-pyo3 = { version = "0.21.0", default-features = false, features = ["auto-initialize"] }
+pyo3 = { version = "0.22.0", default-features = false, features = ["auto-initialize"] }
 nalgebra = { version = "0.32", default-features = false, features = ["std"] }
 
 [package.metadata.docs.rs]
 all-features = true
+
+[features]
+default = ["gil-refs"]
+"gil-refs" = ["pyo3/gil-refs"]

src/datetime.rs

@@ -243,7 +243,7 @@ impl TypeDescriptors {
             }
         };
 
-        dtype.clone().into_bound(py)
+        dtype.bind(py).to_owned()
     }
 }
 

src/dtype.rs

@@ -825,6 +825,7 @@ mod tests {
     use super::*;
 
     use pyo3::{py_run, types::PyTypeMethods};
+    use pyo3::types::PyString;
 
     use crate::npyffi::{is_numpy_2, NPY_NEEDS_PYAPI};
 
@@ -851,7 +852,7 @@ mod tests {
 
     #[test]
     fn test_dtype_names() {
-        fn type_name<'py, T: Element>(py: Python<'py>) -> String {
+        fn type_name<T: Element>(py: Python) -> Bound<PyString> {
             dtype_bound::<T>(py).typeobj().qualname().unwrap()
         }
         Python::with_gil(|py| {

src/strings.rs

@@ -191,7 +191,7 @@ impl TypeDescriptors {
             }
         };
 
-        dtype.clone().into_bound(py)
+        dtype.bind(py).to_owned()
     }
 }