Build wheels for Apple Silicon macs, drop support for Python 3.6 (#37)

This PR upgrades `cibuildwheel` to the latest version to support building macOS arm64 wheels.

The first version of `cibuildwheel` to support Apple Silicon is [2.10.0](https://github.com/pypa/cibuildwheel/releases/tag/v2.10.0), while support for running with Python 3.6 was dropped in [v2.9.0](https://github.com/pypa/cibuildwheel/releases/tag/v2.9.0). Python 3.6 has been [EOL since the end of 2021](https://peps.python.org/pep-0494/), so I opted to remove support for 3.6. Hope that's okay.

Fixes #34 

Bump versions for cibuildwheel, setuptools-golang, and twine.

.github/workflows/build.yml

@@ -23,16 +23,16 @@ jobs:
         with:
           python-version: '3.7'
 
-      - name: Install dependencies
+      - name: Install Python dependencies
         run: |
           python -m pip install --upgrade -r development.txt
 
-      - name: Install Visual C++ for Python 2.7
+      - name: Install Windows dependencies
         if: runner.os == 'Windows'
         run: |
-          choco install vcpython27 -f -y
           choco install golang -f -y
           choco install mingw -f -y
+          pip install --force cibuildwheel==2.3.1
           go get -d
 
       - name: Set up QEMU
@@ -42,7 +42,7 @@ jobs:
       - name: Build Linux wheels and sdist
         if: runner.os == 'Linux'
         env:
-          CIBW_SKIP: "cp35-* *-win32 *-musllinux_i686 *-musllinux_aarch64 *-musllinux_ppc64le *-musllinux_s390x *-manylinux_i686 *-manylinux_aarch64 *-manylinux_ppc64le *-manylinux_s390x"
+          CIBW_SKIP: "cp35-* cp36-* *-win32 *-musllinux_i686 *-musllinux_aarch64 *-musllinux_ppc64le *-musllinux_s390x *-manylinux_i686 *-manylinux_aarch64 *-manylinux_ppc64le *-manylinux_s390x"
           CIBW_BUILD_VERBOSITY: 1
         run: |
           python setup.py sdist
@@ -67,15 +67,16 @@ jobs:
       - name: Build macOS wheels
         if: runner.os == 'macOS'
         env:
-          CIBW_SKIP: "cp35-* *-win32 *-manylinux_i686 *-manylinux_aarch64 *-manylinux_ppc64le *-manylinux_s390x"
+          CIBW_SKIP: "cp35-* cp36-* *-win32 *-manylinux_i686 *-manylinux_aarch64 *-manylinux_ppc64le *-manylinux_s390x"
           CIBW_BUILD_VERBOSITY: 1
+          CIBW_ARCHS_MACOS: x86_64 arm64
         run: |
           python3 -m cibuildwheel --output-dir wheelhouse
 
       - name: Build Windows wheels
         if: runner.os == 'Windows'
         env:
-          CIBW_SKIP: "cp35-* *-win32 *-manylinux_i686 *-manylinux_aarch64 *-manylinux_ppc64le *-manylinux_s390x"
+          CIBW_SKIP: "cp35-* cp36-* *-win32 *-manylinux_i686 *-manylinux_aarch64 *-manylinux_ppc64le *-manylinux_s390x"
           CIBW_BUILD_VERBOSITY: 1
         run: |
           python -m cibuildwheel --output-dir wheelhouse

.github/workflows/test.yml

@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
 
     name: Python ${{ matrix.python-version }}
     steps:

Dockerfile

@@ -1,10 +1,3 @@
-FROM python:3.6-slim-buster as py36
-RUN apt-get update && apt-get install -y golang make build-essential libffi-dev git
-WORKDIR /root
-COPY . /root
-RUN python setup.py bdist_wheel
-
-
 FROM python:3.7-slim-buster as py37
 RUN apt-get update && apt-get install -y golang make build-essential libffi-dev git
 WORKDIR /root

development.txt

@@ -1,9 +1,9 @@
-setuptools-golang==2.3.0
+setuptools-golang==2.7.0
 wheel==0.37.1
 cffi==1.14.5
 black==20.8b1
 isort==5.6.4
-twine==3.1.1
+twine==4.0.2
 pytest==6.2.5
 psutil==5.7.3
-cibuildwheel==2.3.1
+cibuildwheel==2.12.3

setup.py

@@ -61,10 +61,10 @@
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
     ],
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     # I'm not sure what this value is supposed to be
     build_golang={"root": "github.com/ColdHeat/pybluemonday"},
     ext_modules=[setuptools.Extension("pybluemonday/bluemonday", ["bluemonday.go"])],
-    setup_requires=["setuptools-golang==2.3.0", "cffi~=1.1"],
+    setup_requires=["setuptools-golang==2.7.0", "cffi~=1.1"],
     install_requires=["cffi~=1.1"],
 )