gnu: python-dendropy: Update to 4.5.1.

* gnu/packages/bioinformatics.scm (python-dendropy): Update to 4.5.1.
[arguments]: Skip failing tests.

gnu/packages/bioinformatics.scm

@@ -3076,7 +3076,7 @@ CWL descriptions.")
 (define-public python-dendropy
   (package
     (name "python-dendropy")
-    (version "4.4.0")
+    (version "4.5.1")
     (source
      (origin
        (method git-fetch)
@@ -3087,8 +3087,26 @@ CWL descriptions.")
        (file-name (git-file-name name version))
        (sha256
         (base32
-         "097hfyv2kaf4x92i4rjx0paw2cncxap48qivv8zxng4z7nhid0x9"))))
+         "0lrfzjqzbpk1rrra9vd7z2j7q09jy9w1ss7wn2rd85i4k5y3xz8l"))))
     (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'skip-broken-tests
+           (lambda _
+             ;; These tests fail because we have no "paup" executable.
+             (substitute* "tests/test_datamodel_split_bitmasks.py"
+               (((format #false "(~{~a~^|~})"
+                         '("test_group1"
+                           "test_basic_split_counting_under_different_rootings"
+                           "test_basic_split_count_with_incorrect_weight_treatment_raises_error"
+                           "test_basic_split_count_with_incorrect_rootings_raises_error")) m)
+                (string-append "_skip_" m)))
+             (delete-file "tests/test_paup.py")
+             ;; Assert error for unknown reasons
+             (substitute* "tests/test_protractedspeciation.py"
+               (("test_by_num_lineages" m)
+                (string-append "_skip_" m))))))))
     (home-page "https://dendropy.org/")
     (synopsis "Library for phylogenetics and phylogenetic computing")
     (description