perf(call): update strkit_rust_ext to 0.18.1

setup.py

@@ -22,7 +22,7 @@
         "scikit-learn>=1.2.1,<1.6",
         "scipy>=1.10,<1.14",
         "statsmodels>=0.14.0,<0.15",
-        "strkit_rust_ext==0.18.0",
+        "strkit_rust_ext==0.18.1",
     ],
 
     description="A toolkit for analyzing variation in short(ish) tandem repeats.",