Start testing for Python 3.12 (#83)

* Start testing for Python 3.12

* Fix issue found by CodeQL - Inefficient regular expression

.github/workflows/tox.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ["3.8", "3.9", "3.10", "3.11"]
+        python: ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v2

README.rst

@@ -10,7 +10,7 @@ Wikipedia API
 Installation
 ------------
 
-This package requires at least Python 3.4 to install because it's using IntEnum.
+This package requires at least Python 3.8 to install because it's using IntEnum.
 
 .. code-block:: python
 

setup.py

@@ -8,7 +8,9 @@ def fix_doc(txt):
     """
     Fixes documentation so that it's readable in pypi website.
     """
-    return re.sub(r"\.\. PYPI-BEGIN([\r\n]|.)*?PYPI-END", "", txt, re.DOTALL)
+    return re.sub(
+        r"\.\. PYPI-BEGIN([\r\n]|[^\r\n])*?PYPI-END", "", txt, flags=re.DOTALL
+    )
 
 
 with open("README.rst", encoding="utf8") as fileR:
@@ -34,14 +36,11 @@ def fix_doc(txt):
         "Intended Audience :: Developers",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.4",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "License :: OSI Approved :: MIT License",