Version 3.3.3

• Don't parse quoted triples when validating.
• Make sure argument to URI.intern is a string.
• In URI#freeze, synchronize mutex before checking for frozen? This was a race condition.
• More moves towards Triple Terms vs Quoted Triples.
• Don't use Time Zone from a native value in RDF::Literal::Date, as Time Zone is optional and not included in ISO8601. Fixes #447.
• Add more special handling for URI File scheme in general, and some windows-specific code to disambiguate the drive letter from a scheme. Fixes #443.
  • Just use path if there's a file scheme. This leaves out a potential host, which isn't supported anyway.
• Link to the rdf-borsh extension (@artob).
• Fix typo in decimal.rb comments (@bivens-dev).
• short-circuiting slow inherited methods with fast ones (@doriantaylor)
• Replace StringScanner in N-Triples reader (@andyundso)
• Add whitespace to canonical triple term representation.
• Fix some XSD grammar issues for DECIMAL and DOUBLE.