Refine Python version constraint in readme example

bbc2 · bbc2 · commit d83c1b65ceab · 2020-05-12T13:31:34.000+02:00
diff --git a/README.md b/README.md
@@ -84,7 +84,7 @@ load_dotenv()
 load_dotenv(verbose=True)
 
 # OR, explicitly providing path to '.env'
-from pathlib import Path  # python3 only
+from pathlib import Path  # Python 3.6+ only
 env_path = Path('.') / '.env'
 load_dotenv(dotenv_path=env_path)
 ```
