Improve efficiency of diffing algorithms

Bugfix release, correctly handling trailing slash in pointers.

Fix stack overflow in patience diff.

Dpeendency update release

Release 2.2.0

Bugfix and dependency update release

Support more Scala versions

Modularization release

Bump version numbers

Merge commit 'f292031a2a2a52c7ea9ae1b927902416b8a154f0' into v2.0.x