Update upstream source from tag 'debian/upstream/0.5.1'

PKG-INFO

docs/api.rst

java/.mvn/jvm.config

java/pom.xml

...g/softwareheritage/graph/BidirectionalImmutableGraph.java

java/src/main/java/org/softwareheritage/graph/Entry.java

java/src/main/java/org/softwareheritage/graph/Graph.java

...ge/graph/experiments/topology/SubdatasetSizeFunction.java

.../main/java/org/softwareheritage/graph/maps/NodeIdMap.java

.../java/org/softwareheritage/graph/maps/NodeMapBuilder.java

...in/java/org/softwareheritage/graph/maps/NodeTypesMap.java

...org/softwareheritage/graph/utils/ComposePermutations.java

...rg/softwareheritage/graph/utils/FindEarliestRevision.java

swh.graph.egg-info/PKG-INFO

swh.graph.egg-info/SOURCES.txt

swh/__init__.py

swh/graph/backend.py

swh/graph/cli.py

swh/graph/config.py

swh/graph/graph.py