Accepting request 801883 from home:andythe_great

- Add patch for use dataclasses when needed
- Add dataclasses module as dependency for Leap.

OBS-URL: https://build.opensuse.org/request/show/801883
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-screeninfo?expand=0&rev=4

use_dataclasses_when_needed.patch

@@ -0,0 +1,12 @@
+diff -ruN a/setup.py b/setup.py
+--- a/setup.py	2020-04-15 15:13:07.000000000 +0100
++++ b/setup.py	2020-04-30 02:38:18.000000000 +0100
+@@ -11,7 +11,7 @@
+     keywords=["screen", "monitor", "desktop"],
+     classifiers=[],
+     install_requires=[
+-        "dataclasses",
++        "dataclasses ; python_version<'3.7'",
+         'Cython ; sys_platform=="darwin"',
+         'pyobjus ; sys_platform=="darwin"',
+     ],