Add new job to quickly build and run tests

The wheel-building job is too time consuming and therefore doesn't work
optimally to give good feedback. Moreover, it (currently) doesn't
properly test the compiled extension.

This new workflow define jobs for common platforms and python versions
to build and test our package. These jobs run all in parallel, with
each one being fairly small, and therefore should give us quick feedback
after a commit is pushed.

Signed-off-by: Rodrigo Tobar <rtobar@icrar.org>

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

@@ -1,4 +1,4 @@
-name: Build, test, and upload to PyPI
+name: Build distributions and upload to PyPI
 
 # Build on every branch push, tag push, and pull request change:
 on: [push, pull_request]

.github/workflows/fast-built-and-test.yml

@@ -0,0 +1,47 @@
+name: Build and test ijson
+
+# Build on every branch push, tag push, and pull request change:
+on: [push, pull_request]
+
+jobs:
+
+  fast_tests:
+    name: Build ijson and run unit tests (${{ matrix.os }}, ${{ matrix.python_version }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-20.04, windows-2019, macos-12]
+        python_version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+      includes:
+        - os: ubuntu-20.04
+          python_version: "pypy3.9"
+        - os: ubuntu-20.04
+          python_version: "pypy3.10"
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - uses: actions/setup-python@v4
+        name: Install Python
+        with:
+          python-version: ${{ matrix.python_version }}
+
+      - name: Install build test dependencies
+        run: pip install setuptools
+
+      - name: Install Yajl
+        if: ${{ matrix.os == 'ubuntu-20.04' }}
+        run: sudo apt install libyajl-dev
+
+      - name: Build ijson
+        env:
+          IJSON_EMBED_YAJL: ${{ matrix.os != 'ubuntu-20.04' && '1' || '0' }}
+        run: python setup.py develop
+
+      - name: Install test dependencies
+        run: pip install pytest cffi
+
+      - name: Run tests
+        run: pytest -vv