Use checkout and setup-python v3 actions and drop dev install

.github/workflows/ci.yml

@@ -1,5 +1,6 @@
 name: CI
 
+
 on:
   # Triggers the workflow on push or pull request events but only for the master branch
   push:
@@ -10,39 +11,19 @@ on:
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
+
 jobs:
 
-  basic_install:
-    name: 'pip install'
-    runs-on: ubuntu-latest
-    steps:
-
-      - name: Checkout
-        uses: actions/checkout@v2
-        with:
-          ref: master
-
-      - name: Setup python
-        uses: actions/setup-python@v2
-        with:
-          python-version: '3.10'
-
-      - name: Install dependencies
-        run: pip install -e . -r requirements.txt
-
-      - name: Run piker cli
-        run: piker
-
   testing:
-    name: 'test suite'
+    name: 'install + test-suite'
     runs-on: ubuntu-latest
     steps:
 
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Setup python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: '3.10'