Merge branch 'master' into cln/tree-algo

Author: Eddykasp

plugins/org.eclipse.elk.alg.vertiflex/META-INF/MANIFEST.MF

@@ -9,6 +9,7 @@ Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Require-Bundle: com.google.guava,
  org.eclipse.elk.alg.common,
  org.eclipse.elk.core,
- org.eclipse.elk.graph
+ org.eclipse.elk.graph,
+ org.eclipse.emf.common
 Export-Package: org.eclipse.elk.alg.vertiflex,
  org.eclipse.elk.alg.vertiflex.options