Log Message:
py-beautifulsoup4: updated to 4.7.1

4.7.1:

* Fixed a significant performance problem introduced in 4.7.0.

* Fixed an incorrectly raised exception when inserting a tag before or
  after an identical tag.

* Beautiful Soup will no longer try to keep track of namespaces that
  are not defined with a prefix; this can confuse soupselect.

* Tried even harder to avoid the deprecation warning originally fixed in
  4.6.1.