clippy fixes

klondike/src/lib.rs

@@ -174,6 +174,11 @@ impl TableauIter {
 		}
 	}
 }
+impl Default for TableauIter {
+    fn default() -> Self {
+        Self::new()
+    }
+}
 impl Iterator for TableauIter {
 	type Item = Tableau;
 	fn next(&mut self) -> Option<Self::Item> {
@@ -221,6 +226,11 @@ impl FoundationIter {
 		}
 	}
 }
+impl Default for FoundationIter {
+    fn default() -> Self {
+        Self::new()
+    }
+}
 impl Iterator for FoundationIter {
 	type Item = Foundation;
 	fn next(&mut self) -> Option<Self::Item> {