Add a Ruby script to upgrade PostgreSQL data files

Stan Hurequested to merge
sh-postgresql-upgrader into master

This script attempts to upgrade the PostgreSQL data directory from the current version to the target version (11). It currently only works on macOS with Homebrew.

Steps for execution:

  1. support/upgrade-postgresql
  2. gdk reconfigure
  3. gdk restart

This script does NOT:

  1. Install PostgreSQL versions for you
  2. Update your PATH to use PostgreSQL 11
  3. Regenerate Procfile when the first changes
  4. Work with asdf or Linux

Part of #952

Edited by Ash McKenzie

Merge request reports