Fix build errors with Rust 1.73.0 (#996)

The recent Rust 1.73.0 release introduced some changes to clippy's
behavior that are causing failures in CI (and correctly calling out
issues in our code). This commit updates the rustworkx source to correct
these failures.

rustworkx-core/src/centrality.rs

@@ -738,7 +738,7 @@ where
 {
     let alpha: f64 = alpha.unwrap_or(0.1);
 
-    let mut beta: HashMap<usize, f64> = beta_map.unwrap_or_else(HashMap::new);
+    let mut beta: HashMap<usize, f64> = beta_map.unwrap_or_default();
 
     if beta.is_empty() {
         // beta_map was none

src/dag_algo/mod.rs

@@ -628,7 +628,6 @@ pub fn collect_bicolor_runs(
                 }
             } else {
                 for color in colors {
-                    let color = color;
                     ensure_vector_has_index!(pending_list, block_id, color);
                     if let Some(color_block_id) = block_id[color] {
                         block_list[color_block_id].append(&mut pending_list[color]);

src/matching/mod.rs

@@ -92,7 +92,7 @@ fn _inner_is_matching(graph: &graph::PyGraph, matching: &HashSet<(usize, usize)>
             .contains_edge(NodeIndex::new(e.0), NodeIndex::new(e.1))
     };
 
-    if !matching.iter().all(|e| has_edge(e)) {
+    if !matching.iter().all(has_edge) {
         return false;
     }
     let mut found: HashSet<usize> = HashSet::with_capacity(2 * matching.len());

src/score.rs

@@ -10,6 +10,7 @@
 // License for the specific language governing permissions and limitations
 // under the License.
 #![allow(clippy::derive_partial_eq_without_eq)]
+#![allow(clippy::incorrect_partial_ord_impl_on_ord_type)]
 
 use std::cmp::Ordering;
 use std::ops::{Add, AddAssign};