CHANGES for release v0.7.1

Co-authored-by: Hannes Mehnert <[email protected]>

Fix our opam-release.sh script

Update CHANGES for release v0.6.9

Update CHANGES for release v0.6.8

Update CHANGES for release v0.6.7

Merge pull request #471 from mato/release-v0.6.6

Changelog for release 0.6.6

Merge pull request #464 from mato/release-v0.6.5

Documentation updates for release 0.6.5

Changelog for v0.6.4

Changelog for v0.6.3

Merge pull request #416 from mato/changelog

Changelog for v0.6.2