* Fix handling targets with specified db
Handle it in a similar way to handling targets with unspecified db.
Also refactored GraphSyncPkg method to make stuff more DRY.
* update go-mod
Before this fix dependencies for AUR targets were added to the graph
after each addition of a target node. Now dependencies are added only
after all target nodes are added to the graph.
Also added some tests for previously bugged cases.
* use logger in dep graph
* use logger in dep graph
* use logger in dep graph
* only query for AUR packages once per tier. useful for rpc
* fix performance regression for ros-melodic
* prefer name search first
* implement needed at target gathering
* set default config
* fixup tests for needed
* make config into parameter
* test(new engine): local install test
* test(keys): fix test keys
* complete integration test for local install
* add simple mising mechanism
