Ensure suggestions recognize spelling errors as word

Fixes #9 “Suggestion target is not always identical to spelling errors”.
Robustify cword retrieval
Update mklib to v0.2.0

Fixes #10 “No suggestions for words < 2 chars”.
Refactor spelling error recognition to use mklib
Merge branch 'release-1.1.1'
Bump version to 1.1.1