3.0.0

Released Sqlg 3.0.0 on TinkerPop 3.2.6
This is a breaking change release. Testing before upgrading production systems is strongly recommended.

Upgrade instructions

• TinkerPop added supportsNullPropertyValues which Sqlg supports. i.e. supportsNullPropertyValues = true. Before 3.0.0 client code had to call
  Property.isPresent() to check for null values. isPresent will now return true if the property exist in the schema, regardless of the value. To do a null check call (property.isPresent() && property.value() != null). A request has been made to TinkerPop to add a isNull to the Property interface.

• Properties are now specified using a PropertyDefinition. Before 3.0.0 a VertexLabel/EdgeLabel property would be defined with just a name and a PropertyType.

  schema.ensureVertexLabelExist("LabelName", new LinkedHashMap<>() {{
      put("propertyName", PropertyType.STRING);
  }});
  

  this now needs to be refactored to,

  schema.ensureVertexLabelExist("LabelName", new LinkedHashMap<>() {{
      put("propertyName", PropertyDefinition.of(PropertyType.STRING));
  }});
  

  i.e. wrapping the PropertyType with a PropertyDefinition