Prepare for v1.6.0

Author: goodmami

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Change Log
 
-## Unreleased
+## [v1.6.0]
+
+**Release date: 2021-09-30**
 
 ### Added
 
@@ -1344,6 +1346,7 @@ There was no CHANGELOG file prior to this release, so I don't have much
 information about changes, except for
 [commit messages](../../commits/v0.2).
 
+[v1.6.0]: ../../releases/tag/v1.6.0
 [v1.5.1]: ../../releases/tag/v1.5.1
 [v1.5.0]: ../../releases/tag/v1.5.0
 [v1.4.1]: ../../releases/tag/v1.4.1

delphin/__about__.py

@@ -3,7 +3,7 @@
 # the warehouse project:
 #   https://github.com/pypa/warehouse/blob/master/warehouse/__about__.py
 
-__version__ = '1.5.1'
+__version__ = '1.6.0'
 __version_info__ = __version__.replace('.', ' ').replace('-', ' ').split()
 
 __title__ = 'PyDelphin'