fix clippy beta (#4737)

Author: Icxolu

examples/Cargo.toml

@@ -3,6 +3,7 @@ name = "pyo3-examples"
 version = "0.0.0"
 publish = false
 edition = "2021"
+rust-version = "1.63"
 
 [dev-dependencies]
 pyo3 = { path = "..", features = ["auto-initialize", "extension-module"] }

pyo3-build-config/Cargo.toml

@@ -9,6 +9,7 @@ repository = "https://github.com/pyo3/pyo3"
 categories = ["api-bindings", "development-tools::ffi"]
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.63"
 
 [dependencies]
 once_cell = "1"

pyo3-build-config/src/impl_.rs

@@ -1122,11 +1122,7 @@ impl BuildFlags {
         Self(
             BuildFlags::ALL
                 .iter()
-                .filter(|flag| {
-                    config_map
-                        .get_value(flag.to_string())
-                        .map_or(false, |value| value == "1")
-                })
+                .filter(|flag| config_map.get_value(flag.to_string()) == Some("1"))
                 .cloned()
                 .collect(),
         )

pyo3-ffi/Cargo.toml

@@ -10,6 +10,7 @@ categories = ["api-bindings", "development-tools::ffi"]
 license = "MIT OR Apache-2.0"
 edition = "2021"
 links = "python"
+rust-version = "1.63"
 
 [dependencies]
 libc = "0.2.62"

pyo3-macros-backend/Cargo.toml

@@ -9,6 +9,7 @@ repository = "https://github.com/pyo3/pyo3"
 categories = ["api-bindings", "development-tools::ffi"]
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.63"
 
 # Note: we use default-features = false for proc-macro related crates
 # not to depend on proc-macro itself.

pyo3-macros/Cargo.toml

@@ -9,6 +9,7 @@ repository = "https://github.com/pyo3/pyo3"
 categories = ["api-bindings", "development-tools::ffi"]
 license = "MIT OR Apache-2.0"
 edition = "2021"
+rust-version = "1.63"
 
 [lib]
 proc-macro = true

pytests/Cargo.toml

@@ -5,6 +5,7 @@ version = "0.1.0"
 description = "Python-based tests for PyO3"
 edition = "2021"
 publish = false
+rust-version = "1.63"
 
 [dependencies]
 pyo3 = { path = "../", features = ["extension-module"] }