v0.1.2

* Use a connection pool of size 1 to reduce memory churn on target database.

v0.1.1

* Fix pg_stat_replication metrics not being collected due to semantic version
  filter problem.

v0.1.0

* Change default port to 9187.
* Fix regressions with pg_stat_replication on older versions of Postgres.
* Add pg_static metric to store version strings as labels.
* Much more thorough testing structure.
* Move to semantic versioning for releases and docker image publications.

Initial release for publication.

Fix the column labeling properly.