[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

mpl_point_clicker/_clicker.py

@@ -3,6 +3,7 @@
 # Copyright (c) Ian Hunt-Isaak.
 # Distributed under the terms of the Modified BSD License.
 from __future__ import annotations
+
 __all__ = [
     "clicker",
 ]
@@ -141,7 +142,7 @@ def set_positions(self, positions):
             self._positions[k] = list(v)
         self._observers.process('pos-set', self.get_positions())
 
-    def clear_positions(self, classes: str | list[str] | None  = None):
+    def clear_positions(self, classes: str | list[str] | None = None):
         """
         Clear all points of classes in *classes*.
 

setup.cfg

@@ -13,9 +13,9 @@ classifiers =
 [options]
 packages = find:
 install_requires =
+    --future--
     matplotlib
     numpy
-    __future__
 classifiers =
     Intended Audience :: Developers
     Intended Audience :: Science/Research