Release 0.20.4

NEWS

@@ -1,4 +1,4 @@
-0.20.4	UNRELEASED
+0.20.4	2020-06-22
 
  * Print a clearer exception when setup.py is executed on Python < 3.5.
    (Jelmer Vernooij, #783)

dulwich/__init__.py

@@ -22,4 +22,4 @@
 
 """Python implementation of the Git file formats and protocols."""
 
-__version__ = (0, 20, 3)
+__version__ = (0, 20, 4)