changelog: update ahead of v0.89 release

update changelog in preparation for 0.88.0 release (gazette#277)

update CHANGELOG for v0.87.3

update CHANGELOG ahead of v0.87.2

update CHANGELOG ahead of v0.87

changelog: update ahead of 0.86 release

make: update to Go 1.13.4

consumer: add DisableWaitForAck spec field

This field allows for toggling behavior re: whether consumer
transactions should wait for ACKs of messages read this transaction.

Issue gazette#243

mk: add ca-certificates to release Dockerfile

Required for access to 'gs://', etc. Inadvertently removed when stripping
down docker image.

Issue gazette#227

docs: minor build_and_test.md updates

- Fix kubectl apply command (thanks @asonawalla)
- Explicitly link to `run-with-local-registry` kustomize manifest.