freeze Dendropy to <=4.6.1 due to jeetsukumaran/DendroPy#200

bug/change in the newick serialization in ~4.6.2 in dendropy

Author: alpae

pyproject.toml

@@ -15,7 +15,7 @@ authors = [
 ]
 dependencies = [
     "biopython ~=1.81",
-    "DendroPy ~=4.3",
+    "DendroPy >=4.5,<=4.6.1",
     "ete3 ~=3.1",
     "lxml >=4.6,<6",
     "omamer ~=2.0",