update maintainer list

- add @federicobond
- add @caskroom (it started appearing in the draft changelog)
- fix quoting
minor amendments to release process/changelog

based on lessons learned from failed release v0.39.0,
`git push && git push --follow-tags` is smarter because
it reduces the chance of an unreleasable tag being pushed.
(git pushes the tags before it pushes the commits).
Revert "Add Packer v0.6.1"
Merge pull request #5753 from caskroom/revert-5747-fix-5742

Revert "Add Packer v0.6.1"
Update node-webkit to 0.10.2
TexShop 3.39
Merge pull request #5755 from ndr-qef/node-webkit

Update node-webkit to 0.10.2
Merge pull request #5756 from ahbeng/texshop-3.39

TexShop 3.39
Fix Error in checklinks. Closes #5752
Merge pull request #5750 from rolandwalker/release_process_updates

minor amendments to release process/changelog
Merge pull request #5749 from rolandwalker/update_maintainers

update maintainer list
Merge pull request #5754 from federicobond/fix-checklinks

Fix Error in checklinks