add lower bound for dependencies

setup.py

@@ -5,7 +5,7 @@
 
 setuptools.setup(
     name="pyravin",
-    version="0.0.2",
+    version="0.0.3",
     author="clivern",
     author_email="[email protected]",
     description="Apache License, Version 2.0",
@@ -14,12 +14,12 @@
     url="https://github.com/clivern/pyravin",
     packages=setuptools.find_packages(exclude=['tests', 'tests.*']),
     install_requires=[
-        "requests",
-        "pytz",
-        "google-api-python-client",
-        "google-auth",
-        "google-auth-oauthlib",
-        "google-auth-httplib2"
+        "requests>=2.25.0",
+        "pytz>=2020.4",
+        "google-api-python-client>=1.12.8",
+        "google-auth>=1.23.0",
+        "google-auth-oauthlib>=0.4.2",
+        "google-auth-httplib2>=0.0.4"
     ],
     license="Apache License, Version 2.0",
     platforms=['any'],