Update README.md

Author: Evolutionary-Intelligence

docs/README.md

@@ -15,3 +15,7 @@
 * `coverage-badge.svg`: Coverage rate of testing, calculated via
   [Coverage.py](https://coverage.readthedocs.io/) and generated via
   https://smarie.github.io/python-genbadge/
+
+
+
+![visitors](https://visitor-badge.laobi.icu/badge?page_id=Evolutionary-Intelligence.pypop)