Update beautifulsoup4 requirement (#1463)

Updates the requirements on [beautifulsoup4](http://www.crummy.com/software/BeautifulSoup/bs4/) to permit the latest version.

---
updated-dependencies:
- dependency-name: beautifulsoup4
  dependency-type: direct:development
...

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setup.py

@@ -70,7 +70,7 @@ setup(
             "pytest>=5.2.2,<6.3.0",
             "pytest-xdist>=2.2.1,<2.5",
             "pytest-asyncio>=0.10,<0.16",
-            "beautifulsoup4>=4.8.1,<4.10.0",
+            "beautifulsoup4>=4.8.1,<4.11.0",
             "black==21.9b0",
             "pytest-timeout>=1.4.2,<2.1",
             "trustme>=0.7,<0.10",