Figure.psconvert: Ignore the unrecognized 'metadata' parameter added by pytest-mpl v0.17.0 (#3054)

Author: seisman

pygmt/figure.py

@@ -228,6 +228,9 @@ def psconvert(self, **kwargs):
         {verbose}
         """
         kwargs = self._preprocess(**kwargs)
+        # pytest-mpl v0.17.0 added the "metadata" parameter to `Figure.savefig`, which
+        # is not recognized. So remove it before calling `Figure.psconvert`.
+        kwargs.pop("metadata", None)
         # Default cropping the figure to True
         if kwargs.get("A") is None:
             kwargs["A"] = ""