fix: use json to pass dependencies to setup.py

setup.py

@@ -1,13 +1,14 @@
+import json
 from pathlib import Path
 
-import toml
 from setuptools import setup, find_packages
 
 
-def get_dependencies():
-    with open('Pipfile', 'r') as fh:
-        pipfile = fh.read()
-    return toml.loads(pipfile).values()
+def get_dependencies(pipfile_lock=None):
+    if pipfile_lock is None:
+        pipfile_lock = Path("Pipfile.lock")
+    lock_data = json.load(pipfile_lock.open())
+    return [package_name for package_name in lock_data.get('default', {}).keys()]
 
 
 setup(