Bump version to 1.8.1 (#370)

Also removed Angie McMillan-Major's name in the maintainer metadata as
she is no longer active in PyDelphin's development.

Author: goodmami

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Change Log
 
-## [Unreleased]
+## [v1.8.1]
+
+**Release date: 2023-05-29**
 
 ### Maintenance
 
@@ -13,6 +15,8 @@
 
 ## [v1.8.0]
 
+**Release date: 2023-01-08**
+
 ### Python Versions
 
 * Added Python 3.11 support

delphin/__about__.py

@@ -3,7 +3,7 @@
 # the warehouse project:
 #   https://github.com/pypa/warehouse/blob/master/warehouse/__about__.py
 
-__version__ = '1.8.0'
+__version__ = '1.8.1'
 __version_info__ = __version__.replace('.', ' ').replace('-', ' ').split()
 
 __title__ = 'PyDelphin'
@@ -13,7 +13,7 @@
 __author__ = 'Michael Wayne Goodman'
 __email__ = 'goodman.m.w@gmail.com'
 
-__maintainer__ = 'Michael Wayne Goodman and Angie McMillan-Major'
+__maintainer__ = 'Michael Wayne Goodman'
 
 __license__ = 'MIT'
 __copyright__ = '2013--2020 %s <%s> and contributors' % (__author__, __email__)