Fixing up packaging - moved to poetry but forgot classifiers, and got license specification wrong

Author: Carl Crowder

pyproject.toml

@@ -1,11 +1,25 @@
 [tool.poetry]
 name = "pylint-plugin-utils"
-version = "0.8"
+version = "0.8.1"
 readme = "README.md"
 description = "Utilities and helpers for writing Pylint plugins"
 repository = "https://github.com/PyCQA/pylint-plugin-utils"
 authors = ["Carl Crowder <git@carlcrowder.com>"]
-license="GPLv2"
+license="GPL-2.0-or-later"
+classifiers=[
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Console",
+    "Intended Audience :: Developers",
+    "Operating System :: Unix",
+    "Topic :: Software Development :: Quality Assurance",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3 :: Only",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+]
 keywords=["pylint","plugin","helpers"]
 packages = [
   {include = "pylint_plugin_utils/"}