use black format all files;

remove "return state" for functions which will be executed in vmap;
recover randkey as args in mutation methods

tensorneat/algorithm/neat/gene/conn/base.py

@@ -3,7 +3,7 @@ from .. import BaseGene
 
 class BaseConnGene(BaseGene):
     "Base class for connection genes."
-    fixed_attrs = ['input_index', 'output_index', 'enabled']
+    fixed_attrs = ["input_index", "output_index", "enabled"]
 
     def __init__(self):
         super().__init__()