fix: looseversion stringify parameter

Author: satra

nipype/pipeline/plugins/ipythonx.py

@@ -9,7 +9,7 @@
 IPython_not_loaded = False
 try:
     from IPython import __version__ as IPyversion
-    if LooseVersion(IPyversion) < LooseVersion(0.11):
+    if LooseVersion(IPyversion) < LooseVersion('0.11'):
         from IPython.kernel.contexts import ConnectionRefusedError
 except ImportError:
     IPython_not_loaded = True