Add check for newer version

Author: AyahRamahi

compare50/__main__.py

@@ -12,6 +12,8 @@
 import traceback
 import time
 import tempfile
+import requests
+import pkg_resources
 
 import attr
 import lib50
@@ -357,6 +359,12 @@ def main():
 
     args = parser.parse_args()
 
+    # Check for newer version
+    if __version__:
+        latest = max(requests.get("https://pypi.org/pypi/compare50/json").json()["releases"], key=pkg_resources.parse_version)
+        if latest > __version__:
+            print("A newer version is available. Run `pip3 install --upgrade compare50` to upgrade.")
+
     excepthook.verbose = args.verbose
 
     # Set max file size in bytes