Log Message:
py-xlrd: updated to 1.2.0

1.2.0:
- Added support for Python 3.7.
- Added optional support for defusedxml to help mitigate exploits.
- Automatically convert ~ in file paths to the current user's home
  directory.
- Removed examples directory from the installed package. They are still
  available in the source distribution.
- Fixed time.clock() deprecation warning.