Prepare 2.8.1 release

Author: Pierre-Sassoulas

pylint/__pkginfo__.py

@@ -6,7 +6,7 @@
 __version__ = "2.8.1"
 # For an official release, use 'alpha_version = False' and 'dev_version = None'
 alpha_version: bool = False  # Release will be an alpha version if True (ex: '1.2.3a6')
-dev_version: Optional[int] = 1
+dev_version: Optional[int] = None
 
 if dev_version is not None:
     if alpha_version:

requirements_test_min.txt

@@ -1,4 +1,4 @@
 -e .
-astroid==2.5.5  # Pinned to a specific version for tests
+astroid==2.5.6  # Pinned to a specific version for tests
 pytest~=6.2
 pytest-benchmark~=3.4

setup.cfg

@@ -41,7 +41,7 @@ project_urls =
 [options]
 packages = find:
 install_requires =
-    astroid>=2.5.4,<2.7
+    astroid>=2.5.6,<2.7
     isort>=4.2.5,<6
     mccabe>=0.6,<0.7
     toml>=0.7.1