Add packaging to list of dependencies

Now that packaging is no longer part of the standard library, we need
to add it to the list of dependencies. This solves the issue seen when
trying to run `broker --help`.

broker/commands.py

@@ -156,14 +156,13 @@ def provider_cmd(ctx, *args, **kwargs):  # the actual subcommand
 def cli(version):
     """Command-line interface for interacting with providers."""
     if version:
+        from packaging.version import Version
         import pkg_resources
+        import requests
 
         broker_version = pkg_resources.get_distribution("broker").version
         # check the latest version publish to PyPi
         try:
-            from packaging.version import Version
-            import requests
-
             latest_version = Version(
                 requests.get("https://pypi.org/pypi/broker/json", timeout=60).json()["info"][
                     "version"

pyproject.toml

@@ -26,6 +26,7 @@ dependencies = [
     "click",
     "dynaconf<4.0.0",
     "logzero",
+    "packaging",
     "pyyaml",
     "setuptools",
     "ssh2-python",