Adds packaging package to requirements because of using it on PBCKP-289

Author: KoMiI

Diff for: setup.py

@@ -6,7 +6,13 @@
     from distutils.core import setup
 
 # Basic dependencies
-install_requires = ["pg8000", "port-for>=0.4", "six>=1.9.0", "psutil"]
+install_requires = [
+    "pg8000",
+    "port-for>=0.4",
+    "six>=1.9.0",
+    "psutil",
+    "packaging",
+]
 
 # Add compatibility enum class
 if sys.version_info < (3, 4):