Update pylint from 2.12.1 to 3.1.0

When trying to add Python 3.11 and 3.12, tests failed due to a
dependency chain issue with the chain starting at pylint and ending at
an outdated version of wrapt that did not support Python 3.11+. The
earliest version of pylint with an updated version of wrapt is pylint
2.15. However, pylint 3.1.0 is the current version, so use that instead.

Author: RytoEX

README.md

@@ -63,7 +63,7 @@ The lintner versions are:
 ```bash
 pycodestyle==2.8.0
 pydocstyle==6.1.1
-pylint==2.12.1
+pylint==3.1.0
 mypy==0.910
 black==21.11b1
 flake8==4.0.1

requirements.txt

@@ -4,5 +4,5 @@ isort==5.10.1
 mypy~=0.961
 pycodestyle==2.8.0
 pydocstyle==6.1.1
-pylint==2.12.1
-vulture==2.3
+pylint==3.1.0
+vulture==2.3