Release 0.20.22.

NEWS

@@ -1,4 +1,4 @@
-0.20.22	UNRELEASED
+0.20.22	2021-05-24
 
  * Prevent removal of refs directory when the last ref is
    deleted. (Jelmer Vernooij)

dulwich/__init__.py

@@ -22,4 +22,4 @@
 
 """Python implementation of the Git file formats and protocols."""
 
-__version__ = (0, 20, 21)
+__version__ = (0, 20, 22)

setup.py

@@ -23,7 +23,7 @@ if sys.version_info < (3, 5):
         'For 2.7 support, please install a version prior to 0.20')
 
 
-dulwich_version_string = '0.20.21'
+dulwich_version_string = '0.20.22'
 
 
 class DulwichDistribution(Distribution):