New upstream version 9.19.0

.github/PULL_REQUEST_TEMPLATE.md

.github/workflows/ci.yml

.github/workflows/cicd.yml

.github/workflows/validate.yml

CHANGELOG.md

CHANGELOG.rst

CONTRIBUTING.rst

config/release-templates/.components/changelog_1.0.0.rst.j2

config/release-templates/.components/changelog_header.rst.j2

config/release-templates/.components/changelog_init.rst.j2

config/release-templates/.components/changelog_update.rst.j2

config/release-templates/.components/changes.md.j2

config/release-templates/.components/changes.rst.j2

config/release-templates/.components/first_release.rst.j2

config/release-templates/.components/macros.md.j2

config/release-templates/.components/macros.rst.j2

...g/release-templates/.components/unreleased_changes.rst.j2

config/release-templates/.components/versioned_changes.md.j2

...ig/release-templates/.components/versioned_changes.rst.j2

config/release-templates/.release_notes.md.j2