Created originally on Bitbucket by Eiríkur Torfason
Was already merged in Bitbucket before import, marked as merged by the import user
This PR attempts to fix the issue.
bind_hyperlinks, check if
ref points to a MergedCell. If so, place link on the top-left cell of the merged range.
test_merged_hyperlinks by adding a hyperlink pointing to a merged cell in
complex-styles-worksheet.xml, then asserting that the link is placed on the top-left cell.
Locally, the tox tests are green across the board except for the pypy3 target that fails while installing dependencies.