v0.19.6

Install/update via the bootstrap script:

wget https://raw.githubusercontent.com/dokku/dokku/v0.19.6/bootstrap.sh
sudo DOKKU_TAG=v0.19.6 bash bootstrap.sh

Other

• #3761: @pithyless Fix type-errors in dokku-installer.py
• #3759: @dependabot-preview[bot] chore(deps-dev): bump heroku/heroku-buildpack-php from 163 to 164 in /tests/apps/php
• #3758: @dependabot-preview[bot] chore(deps): bump jetty-servlet from 9.4.21.v20190926 to 9.4.22.v20191022 in /tests/apps/java