Add Python 3.13 to and drop 3.8 from testing matrix

Author: brainsik

.github/workflows/main.yml

@@ -45,16 +45,16 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy-3.10"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "pypy-3.10"]
         include:
           - os: windows-latest
-            python-version: "3.8"
+            python-version: "3.9"
           - os: macos-latest
-            python-version: "3.8"
+            python-version: "3.9"
           - os: windows-latest
-            python-version: "3.12"
+            python-version: "3.13"
           - os: macos-latest
-            python-version: "3.12"
+            python-version: "3.13"
     runs-on: ${{ matrix.os }}
 
     steps: