git: openjdk/shenandoah-visualizer: master: Pre-integration tests: JDK 7 is actually unsupported

[duke]

Changeset: 1b8285ef
Author:    Aleksey Shipilev <shade at redhat.com>
Date:      2020-11-16 19:38:58 +0000
URL:       https://github.com/openjdk/shenandoah-visualizer/commit/1b8285ef

Pre-integration tests: JDK 7 is actually unsupported

! .github/workflows/pre-integration.yml