rp-tree-0.3.6: Changelog.md

0.3.6

- relax lower dependency bounds to ensure it builds with GHC 8.6.5 (== stackage lts 14.27) as well

0.2

- fix 'candidates' such that 'knn' now does the right thing
- now 'knn' accepts a distance function as parameter as well
- add I/O functionality
- some time benchmarks