package/python-modbus-tk: bump to version 1.1.1

package/python-modbus-tk: bump to version 1.1.1

This includes the following changes:

5732f86 1.1.1
d8e9b32 pep8
4795bc7 Add Jackson Matheson to contributors
26db934 Merge branch 'master' of https://github.com/ljean/modbus-tk
837a12b Merge pull request #125 from jacksonmatheson/master
07b06f8 Fixed READ_WRITE_MULTIPLE_REGISTERS, added write_starting_address_FC23

Also update hash file formatting (2 spaces).

Signed-off-by: Pierre-Jean Texier <pjtexier@koncepto.io>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>