CHANGELOG: Add missing references (#327)
CHANGELOG: Add missing references (#327)

Markdown reference links take the form,

    [foo] bar

    [foo]: https://example.com

We were placing these at the bottom of the file which made them easy to
forget -- we've missed them for 1.12, 1.13, and 1.14.

Move the reference links to each release's section, and add missing
links.
uber-go/dig,uber-go/dig