Release 3.2.0

• Minimum Ruby version now 2.6.

Release 3.1.0

• Updates for 3.1 release and Ruby 2.7 calling sequences.

Release 2.2.0

• Update minimum ruby version to 2.2.2. See ruby-rdf/rdf#307.
• Use to_h, instead of to_hash.
• Add feature supports? :literal_equality.

Release 2.0.1

Improved #insert_statement and #delete_statement. Use bulk operations in #apply_changeset. From @mjsuhonos.

Release 2.0.0

Updates to use RDF.rb 2.0 and mongo ~> 2.2. This changes the calling sequence when using a hash; URI form encouraged.