Include localstack-core[runtime] in dev install target

This makes getting started with the project easier, and less confusing.

.github/workflows/main.yml

@@ -33,10 +33,6 @@ jobs:
           sudo apt-get install -y libsasl2-dev
           make install
 
-          # Note: currently required to import snapshot utils from localstack
-          # TODO remove once imports are better organized in localstack
-          . .venv/bin/activate; pip install localstack-core[runtime]
-
       - name: Run tests
         run: |
           make lint

setup.py

@@ -28,6 +28,7 @@
         "flake8",
         "flake8-black",
         "flake8-isort",
+        "localstack-core[runtime]",
         "pytest",
         "pytest-httpserver",
         "localstack-snapshot",