Bump version number to 1.1.1
Merge branch 'release/1.1.1'

* release/1.1.1:
  Bump version number to 1.1.1
  Fix conflicting options error in `toopher-pair`
Merge tag 'v1.1.1' into develop

v1.1.1

* tag 'v1.1.1':
  Bump version number to 1.1.1