Bring back GitHub Actions, remove Travis

Our Travis infrastructure has become increasingly fragile, with our
"open source" deal not really working as it should, which has become
increasingly frustrating. Coming back to GitHub Actions should solve
this.

We previously had GitHub Actions support, but removed it in favor of
Travis to gain ARM wheel support. This can be overcome though by using
QEMU in GitHub Actions (at least that's how I've done in in other
projects), and hopefully natively at some point too.

This reverts commit bd800a7, and adds
support for ARM wheel builds in GitHub Actions. It also removes the
Travis infrastructure since we shouldn't need it anymore.

Author: rtobar

.github/workflows/deploy-to-pypi.yml

@@ -0,0 +1,84 @@
+name: Build, test, and upload to PyPI
+
+# Build on every branch push, tag push, and pull request change:
+on: [push]
+
+jobs:
+  build_wheels:
+    name: Build wheels on ${{matrix.arch}} for ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-20.04, windows-2019, macos-10.15]
+        arch: [auto]
+        include:
+          - os: ubuntu-20.04
+            arch: aarch64
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+
+      - uses: actions/setup-python@v4
+        name: Install Python
+        with:
+          python-version: '3.7'
+
+      - uses: docker/setup-qemu-action@v1
+        if: ${{ matrix.arch == 'aarch64' }}
+        name: Set up QEMU
+
+      - name: Install cibuildwheel
+        run: |
+          python -m pip install cibuildwheel
+
+      - name: Build wheels
+        run: |
+          python -m cibuildwheel --output-dir wheelhouse
+        env:
+          CIBW_ARCHS_LINUX: ${{matrix.arch}}
+          CIBW_ARCHS_MACOS: "x86_64 arm64 universal2"
+          CIBW_BEFORE_ALL: "bash -c 'cd \"{project}\"; sh .github/tools/install_yajl.sh'"
+          CIBW_BUILD_VERBOSITY: 1
+          CIBW_ENVIRONMENT_MACOS: "IJSON_EMBED_YAJL=1"
+          CIBW_ENVIRONMENT_WINDOWS: "IJSON_EMBED_YAJL=1"
+          CIBW_TEST_COMMAND: "bash -c 'cd \"{project}\"; pytest -vv'"
+          CIBW_TEST_REQUIRES: pytest cffi
+
+      - uses: actions/upload-artifact@v3
+        with:
+          path: ./wheelhouse/*.whl
+
+  build_sdist:
+    name: Build source distribution
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-python@v4
+        name: Install Python
+        with:
+          python-version: '3.7'
+
+      - name: Build sdist
+        run: python setup.py sdist
+
+      - uses: actions/upload-artifact@v3
+        with:
+          path: dist/*.tar.gz
+
+  upload_pypi:
+    needs: [build_wheels, build_sdist]
+    runs-on: ubuntu-latest
+    if: startsWith(github.event.ref, 'refs/tags/v')
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: artifact
+          path: dist
+
+      - uses: pypa/gh-action-pypi-publish@master
+        with:
+          user: __token__
+          password: ${{ secrets.pypi_password }}

.travis.yml

@@ -1,5 +1,5 @@
-.. image:: https://travis-ci.com/ICRAR/ijson.svg?branch=master
-    :target: https://travis-ci.com/ICRAR/ijson
+.. image:: https://github.com/ICRAR/ijson/actions/workflows/deploy-to-pypi.yml/badge.svg
+    :target: https://github.com/ICRAR/ijson/actions/workflows/deploy-to-pypi.yml
 
 .. image:: https://ci.appveyor.com/api/projects/status/32wiho6ojw3eakp8/branch/master?svg=true
     :target: https://ci.appveyor.com/project/rtobar/ijson/branch/master