rapidfuzz-cpp: add passthru.tests.levenshtein

`python3Packages.levenshtein` crucially depends on `rapidfuzz-cpp`, so
we add it to `passthru.tests` to prevent future breakage.

Co-authored-by: Robert Schütz <github@dotlambda.de>

pkgs/development/libraries/rapidfuzz-cpp/default.nix

@@ -3,6 +3,7 @@
 , fetchFromGitHub
 , cmake
 , catch2_3
+, python3Packages
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -33,6 +34,13 @@ stdenv.mkDerivation (finalAttrs: {
     catch2_3
   ];
 
+  passthru = {
+    tests = {
+      /** `python3Packages.levenshtein` crucially depends on `rapidfuzz-cpp` */
+      inherit (python3Packages) levenshtein;
+    };
+  };
+
   meta = {
     description = "Rapid fuzzy string matching in C++ using the Levenshtein Distance";
     homepage = "https://github.com/maxbachmann/rapidfuzz-cpp";