Add msgspec installs, drop py3.7

.github/workflows/ci.yml

@@ -3,6 +3,7 @@ name: CI
 on: push
 
 jobs:
+
   mypy:
     name: 'MyPy'
     runs-on: ubuntu-latest
@@ -23,23 +24,59 @@ jobs:
         run: mypy tractor/ --ignore-missing-imports
 
   testing:
+
     name: '${{ matrix.os }} Python ${{ matrix.python }} - ${{ matrix.spawn_backend }}'
     timeout-minutes: 9
     runs-on: ${{ matrix.os }}
+
     strategy:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest]
         python: ['3.8', '3.9']
         spawn_backend: ['trio', 'mp']
+
     steps:
+
       - name: Checkout
         uses: actions/checkout@v2
+
       - name: Setup python
         uses: actions/setup-python@v2
         with:
           python-version: '${{ matrix.python }}'
+
       - name: Install dependencies
         run: pip install -U . -r requirements-test.txt -r requirements-docs.txt --upgrade-strategy eager
+
+      - name: Run tests
+        run: pytest tests/ --spawn-backend=${{ matrix.spawn_backend }} -rs
+
+  testing-msgspec:
+    # runs py3.9 jobs on all OS's but with optional `msgspec` dep installed
+    name: '${{ matrix.os }} Python ${{ matrix.python }} - ${{ matrix.spawn_backend }} - msgspec'
+    timeout-minutes: 10
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+        python: ['3.9']
+        spawn_backend: ['trio', 'mp']
+
+    steps:
+
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '${{ matrix.python }}'
+
+      - name: Install dependencies
+        run: pip install -U .[msgspec] -r requirements-test.txt -r requirements-docs.txt --upgrade-strategy eager
+
       - name: Run tests
         run: pytest tests/ --spawn-backend=${{ matrix.spawn_backend }} -rs