[CI] Adding Python 3.12 build to GithubActions (#19)

Author: hugsy

.github/workflows/build.yml

@@ -84,7 +84,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
         variant:
           - {os: windows-latest, arch: x64, config: RelWithDebInfo, py-arch: x64}
         #   - {os: windows-latest, arch: arm64, config: RelWithDebInfo, py-arch: x64} # Unsupported (see https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json)
@@ -166,7 +166,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
         variant:
           - {os: windows-latest, arch: x64, config: RelWithDebInfo, py-arch: x64}
           - {os: ubuntu-latest, arch: x64, config: RelWithDebInfo, py-arch: x64}