Update rdflib to 4.2.1

[pyup-bot]

There's a new version of rdflib available.
You are currently using 3.4.0. I have updated it to 4.2.1

These links might come in handy: PyPI | Changelog | Repo

Changelog

4.2.1

========================

This is a bug-fix release.

Minor enhancements:

• Added a Networkx connector
  471,
  507
• Added a graph_tool connector
  473
• Added a graphs method to the Dataset object
  504,
  495
• Batch commits for SPARQLUpdateStore
  486

Bug fixes:

• Fixed bnode collision bug
  506,
  496,
  494
• fix util.from_n3() parsing Literals with datatypes and Namespace support
  503,
  502
• make Identifier.__hash__ stable wrt. multi processes
  501,
  500
• fix handling URLInputSource without content-type
  499,
  498
• no relative import in algebra when run as a script
  497
• Duplicate option in armstrong theme.conf removed
  491
• Variable.__repr__ returns a python representation string, not n3
  488
• fixed broken example
  482
• trig output fixes
  480
• set PYTHONPATH to make rdfpipe tests use the right rdflib version
  477
• fix RDF/XML problem with unqualified use of rdf:about
  470,
  468
• AuditableStore improvements
  469,
  463
• added asserts for graph.set([s,p,o]) so s and p aren't None
  467
• threading.RLock instances are context managers
  465
• SPARQLStore does not transform Literal('') into Literal('None') anymore
  459,
  457
• slight performance increase for graph.all_nodes()
  458

Testing improvements:

• travis: migrate to docker container infrastructure
  508
• test for narrow python builds (chars > 0xFFFF) (related to
  453,
  454
  )
  456,
  509
• dropped testing py3.2
  448
• Running a local fuseki server on travis and making it failsafe
  476,
  475,
  474,
  466,
  460
• exclude def main(): functions from test coverage analysis
  472

4.2.0

========================

This is a new minor version of RDFLib including a handful of new features:

• Supporting N-Triples 1.1 syntax using UTF-8 encoding
  447,
  449,
  400
• Graph comparison now really works using RGDA1 (RDF Graph Digest Algorithm 1)
  441
  385
• More graceful degradation than simple crashing for unicode chars > 0xFFFF on
  narrow python builds. Parsing such characters will now work, but issue a
  UnicodeWarning. If you run python -W all you will already see a warning on
  import rdflib will show a warning (ImportWarning).
  453,
  454
• URLInputSource now supports json-ld
  425
• SPARQLStore is now graph aware
  401,
  402
• SPARQLStore now uses SPARQLWrapper for updates
  397
• Certain logging output is immediately shown in interactive mode
  414
• Python 3.4 fully supported
  418

Minor enhancements & bugs fixed:

• Fixed double invocation of 2to3
  437
• PyRDFa parser missing brackets
  434
• Correctly handle \uXXXX and \UXXXXXXXX escapes in n3 files
  426
• Logging cleanups and keeping it on stderr
  420
  414
  413
• n3: allow base URI to have a trailing ''
  407
  379
• microdata: add file:// to base if it's a filename so rdflib can parse its own
  output
  406
  403
• TSV Results parse skips empty bindings in result
  390
• fixed accidental test run due to name
  389
• Bad boolean list serialization to Turtle & fixed ambiguity between
  Literal(False) and None
  387
  382
• Current version number & PyPI link in README.md
  383

4.1.2

========================

This is a bug-fix release.

• Fixed unicode/str bug in py3 for rdfpipe
  375

4.1.1

========================

This is a bug-fix release.

This will be the last RDFLib release to support python 2.5.

• The RDF/XML Parser was made stricter, now raises exceptions for
  illegal repeated node-elements.
  363

• The SPARQLUpdateStore now supports non-ascii unicode in update
  statements
  356

• Fixed a bug in the NTriple/NQuad parser wrt. to unicode escape sequences
  352

• HTML5Lib is no longer pinned to 0.95
  355

• RDF/XML Serializer now uses parseType=Literal for well-formed XML literals

• A bug in the manchester OWL syntax was fixed
  355

4.1

======================

This is a new minor version RDFLib, which includes a handful of new features:

• A TriG parser was added (we already had a serializer) - it is
  up-to-date wrt. to the newest spec from: http://www.w3.org/TR/trig/

• The Turtle parser was made up to date wrt. to the latest Turtle spec.

• Many more tests have been added - RDFLib now has over 2000
  (passing!) tests. This is mainly thanks to the NT, Turtle, TriG,
  NQuads and SPARQL test-suites from W3C. This also included many
  fixes to the nt and nquad parsers.

• ConjunctiveGraph and Dataset now support directly adding/removing
  quads with add/addN/remove methods.

• rdfpipe command now supports datasets, and reading/writing context
  sensitive formats.

• Optional graph-tracking was added to the Store interface, allowing
  empty graphs to be tracked for Datasets. The DataSet class also saw
  a general clean-up, see: 309

• After long deprecation, BackwardCompatibleGraph was removed.

Minor enhancements/bugs fixed:

• Many code samples in the documentation were fixed thanks to PuckCh

• The new IOMemory store was optimised a bit

• SPARQL(Update)Store has been made more generic.

• MD5 sums were never reinitialized in rdflib.compare

• Correct default value for empty prefix in N3
  312

• Fixed tests when running in a non UTF-8 locale
  344

• Prefix in the original turtle have an impact on SPARQL query
  resolution
  313

• Duplicate BNode IDs from N3 Parser
  305

• Use QNames for TriG graph names
  330

• \uXXXX escapes in Turtle/N3 were fixed
  335

• A way to limit the number of triples retrieved from the
  SPARQLStore was added
  346

• Dots in localnames in Turtle
  345
  336

• BNode as Graph's public ID
  300

• Introduced ordering of QuotedGraphs
  291

4.0.1

========================

Following RDFLib tradition, some bugs snuck into the 4.0 release.
This is a bug-fixing release:

• the new URI validation caused lots of problems, but is
  nescessary to avoid ''RDF injection'' vulnerabilities. In the
  spirit of ''be liberal in what you accept, but conservative in
  what you produce", we moved validation to serialisation time.

• the rdflib.tools package was missing from the
  setup.py script, and was therefore not included in the
  PYPI tarballs.

• RDF parser choked on empty namespace URI
  288

• Parsing from sys.stdin was broken
  285

• The new IO store had problems with concurrent modifications if
  several graphs used the same store
  286

• Moved HTML5Lib dependency to the recently released 1.0b1 which
  support python3

4.0

======================

This release includes several major changes:

• The new SPARQL 1.1 engine (rdflib-sparql) has been included in
  the core distribution. SPARQL 1.1 queries and updates should
  work out of the box.

• SPARQL paths are exposed as operators on URIRefs, these can
  then be be used with graph.triples and friends:

 List names of friends of Bob:
g.triples(( bob, FOAF.knows/FOAF.name , None ))

All super-classes:

g.triples(( cls, RDFS.subClassOf * '+', None ))

 * a new ```graph.update``` method will apply SPARQL update statements

• Several RDF 1.1 features are available:
• A new DataSet class
• XMLLiteral and HTMLLiterals
• BNode (de)skolemization is supported through BNode.skolemize,
  URIRef.de_skolemize, Graph.skolemize and Graph.de_skolemize

• Handled of Literal equality was split into lexical comparison
  (for normal == operator) and value space (using new Node.eq
  methods). This introduces some slight backwards incomaptible
  changes, but was necessary, as the old version had
  inconsisten hash and equality methods that could lead the
  literals not working correctly in dicts/sets.
  The new way is more in line with how SPARQL 1.1 works.
  For the full details, see:

https://github.com/RDFLib/rdflib/wiki/Literal-reworking

• Iterating over QueryResults will generate ResultRow objects,
  these allow access to variable bindings as attributes or as a
  dict. I.e.

for row in graph.query('select ... ') :
   print row.age, row["name"]

• "Slicing" of Graphs and Resources as syntactic sugar:
  (271)

graph[bob : FOAF.knows/FOAF.name]
          -> generator over the names of Bobs friends

• The SPARQLStore and SPARQLUpdateStore are now included
  in the RDFLib core

• The documentation has been given a major overhaul, and examples
  for most features have been added.

Minor Changes:

• String operations on URIRefs return new URIRefs: (258)

>>> URIRef('http://example.org/')+'test
rdflib.term.URIRef('http://example.org/test')

• Parser/Serializer plugins are also found by mime-type, not just
  by plugin name: (277)
• Namespace is no longer a subclass of URIRef
• URIRefs and Literal language tags are validated on construction,
  avoiding some "RDF-injection" issues (266)
• A new memory store needs much less memory when loading large
  graphs (268)
• Turtle/N3 serializer now supports the base keyword correctly (248)
• py2exe support was fixed (257)
• Several bugs in the TriG serializer were fixed
• Several bugs in the NQuads parser were fixed

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖