Fix bug in 3.8.3 where axes are joined rather join

Author: cvanelteren

proplot/axes/cartesian.py

@@ -576,7 +576,7 @@ def _sharex_limits(self, sharex):
             if ax1.get_autoscalex_on() and not ax2.get_autoscalex_on():
                 ax1.set_xlim(ax2.get_xlim())  # non-default limits
         # Copy non-default locators and formatters
-        self.get_shared_x_axes().join(self, sharex)  # share limit/scale changes
+        self.get_shared_x_axes().joined(self, sharex)  # share limit/scale changes
         if sharex.xaxis.isDefault_majloc and not self.xaxis.isDefault_majloc:
             sharex.xaxis.set_major_locator(self.xaxis.get_major_locator())
         if sharex.xaxis.isDefault_minloc and not self.xaxis.isDefault_minloc: