Add pytest and psycopg3 to the primers

Author: Pierre-Sassoulas

tests/primer/packages_to_lint.json

@@ -4,6 +4,16 @@
     "branch": "main",
     "directories": ["src/flask"]
   },
+  "pytest": {
+    "url": "https://github.com/pytest-dev/pytest.git",
+    "branch": "main",
+    "directories": ["src/_pytest"]
+  },
+  "psycopg": {
+    "url": "https://github.com/psycopg/psycopg.git",
+    "branch": "master",
+    "directories": ["psycopg/psycopg"]
+  },
   "keras": {
     "url": "https://github.com/keras-team/keras.git",
     "branch": "master",