Merge pull request #8 from RyanLua/dynamic-version

Make version dynamic for `--version` flag

src/instawebhooks/__main__.py

@@ -9,6 +9,7 @@
 from datetime import datetime, timedelta
 from itertools import dropwhile, takewhile
 from time import sleep
+import importlib.metadata
 
 try:
     from aiohttp import ClientSession
@@ -41,6 +42,8 @@ def closure_check_regex(arg_value):
     return closure_check_regex
 
 
+version = importlib.metadata.version("instawebhooks")
+
 # Set up logging
 logger = logging.getLogger(__name__)
 logging.basicConfig(
@@ -90,7 +93,7 @@ def closure_check_regex(arg_value):
     help="don't show the post embed and only send message content",
     action="store_true",
 )
-parser.add_argument("--version", action="version", version="%(prog)s 0.1.1")
+parser.add_argument("--version", action="version", version="%(prog)s " + version)
 args = parser.parse_args()
 
 # Set the logger to debug if verbose is enabled