Bump copyright year to 2021

Photonios · Photonios · commit 7b5aadd63c0e · 2021-02-24T10:14:54.000+02:00
diff --git a/docs/source/conf.py b/docs/source/conf.py
@@ -9,7 +9,7 @@
 django.setup()
 
 project = "django-postgres-extra"
-copyright = "2019-2020, Sector Labs"
+copyright = "2019-2021, Sector Labs"
 author = "Sector Labs"
 extensions = [
     "sphinx_rtd_theme",
