Log Message:
py-MechanicalSoup: Update to 1.0.0

Changes:
1.0.0
=====
This is the last release that will support Python 2.7. Thanks to the
many contributors that made this release possible!

Main changes
------------
- Added support for Python 3.8 and 3.9.
- StatefulBrowser has new properties page, form, and url, which can be
  used in place of the methods get_current_page, get_current_form and
  get_url respectively (e.g. the new x.page is equivalent to
  x.get_current_page()). These methods may be deprecated in a future
  release. [#175]
- StatefulBrowser.form will raise an AttributeError instead of
  returning None if no form has been selected yet. Note that
  StatefulBrowser.get_current_form() still returns None for backward
  compatibility.

Bug fixes
---------
- Decompose <select> elements with the same name when adding a new
  input element to a form. [#297]
- The params and data kwargs passed to submit will now properly be
  forwarded to the underlying request for GET methods (whereas previously
  params was being overwritten by data). [#343]