v5.4.0

Changelog

61674f4 Update CHANGELOG.md for v5.4.0
f2a3325 touch README for 5.4 release
33c268a Update goreleaser.yml
25044f4 Update ci.yml
236f31c Update README.md
f260b3c Update README.md
1a9e905 Use latest codecov-action
02a8939 Use elasticsearch action from its own repo and remove no longer used vendor directory
4783699 Merge pull request #23 from nyaruka/actions
68e521b Fix README
acb4ab8 Convert to github actions
67c8b38 Merge pull request #20 from nyaruka/remove_is_test
e262aca Merge pull request #21 from brianhlin/add-pg-11-12-tests
0bcff35 Revert "Add PostgreSQL 12 tests"
180e893 Downgrade to Xenial due to PG11 failures
2961367 Fixup dist keyword
11e8f81 Add PostgreSQL 12 tests
1d391ef Add PostgreSQL version env var
65c2dc2 Update distro to bionic
9f06021 Add PostgreSQL 11 tests
9833b01 Remove contact.is_test from test database