Bump to dev version

rocky · rocky · commit 41dee8c9dd7b · 2021-07-31T20:59:15.000-04:00
diff --git a/mathics/version.py b/mathics/version.py
@@ -5,4 +5,4 @@
 # well as importing into Python. That's why there is no
 # space around "=" below.
 # fmt: off
-__version__="4.0.0"  # noqa
+__version__="4.0.1.dev0"  # noqa
