v3.1.0

• Dropped Python 2.6 support

• Fixed KeyError in urllib.quote in Python 2 (#605, #558)

• Fixed Worksheet.title being out of sync after using update_title (#542 by @ryanpineo)

• Fix parameter typos in docs (#616 by @bryanallen22)

• Miscellaneous docs fixes (#604 by @dgilman)

• Fixed typo in docs (#591 by @davidefiocco)

• Added a method to copy spreadsheets (#625 by @dsask)

• Added with_link attribute when sharing / adding permissions (#621 by @epicfaace)

• Added ability to duplicate a worksheet (#617)

• Change default behaviour of numericise function #499 (#502 by @danthelion)

• Added stacklevel=2 to deprecation warnings