version bump to reflect resourceless XML elements
Sort triples before testing equality in 2 tests

Tests no_dupes and match_none compare lists of triples. Commit
2378635b5357aacecc14b6d0c0fa8b4dfd98ff76 introduces the HashMap
unordered container. So URIs are hashed prior to being added to an RDF
graph. A `triplesOf` call on the RDF graph will likely return the
triples in a different order to the list passed to `mkRdf`. The fix is
to sort triples in the two failing test cases with `sortTriples` before
testing the same triples lists for equality.
Merge branch 'master' of github.com:robstewart57/rdf4h
Merge remote-tracking branch 'tmp-maersten/Switch_MGraph_to_HashMap_and_HashSet'
version bump to 1.2.4