add github workflow for test-pypi cross-OS wheel builds

Author: AlePalu

.github/workflows/testpypi-linux.yml

@@ -1,4 +1,4 @@
-name: Build Linux ABI3 wheels (TestPyPI)
+name: Build Linux wheels (TestPyPI)
 
 on:
   push:
@@ -41,7 +41,7 @@ jobs:
         run: python -m cibuildwheel --output-dir wheelhouse
         env:
           CIBW_BUILD: "cp311-* cp312-* cp313-* cp314-*"
-          CIBW_ARCHS_LINUX: "x86_64 arm64"
+          CIBW_ARCHS_LINUX: "auto aarch64"
 
       - name: Upload to TestPyPI
         run: |

.github/workflows/testpypi-macos.yml

@@ -1,4 +1,4 @@
-name: Build and upload wheels to TestPyPI
+name: Build macOS wheels (TestPyPI)
 
 on:
   push:
@@ -46,6 +46,7 @@ jobs:
           CIBW_ENVIRONMENT: >
             CC=$(brew --prefix llvm@20)/bin/clang
             CXX=$(brew --prefix llvm@20)/bin/clang++
+            MACOSX_DEPLOYMENT_TARGET=11.0
 
       - name: Upload to TestPyPI
         run: |