0.7.0 #

• Breaking Change: properly generate nullable types for nullable elements in lists

• generate 'possibleTypesMap' in the schema
• to disable, set 'generate_possible_types_map' to false in build.yaml

• Fixes dependency issues by upgrading to gql_code_builder.

• Support interfaces.

• Upgrade gql_code_builder.

• Breaking Change - generated files are built to __generated__ subdirectory

• bump built_value

• add initial null-safety support

• bump gql version

• update gql_code_builder dependency

• fix inline fragment sub-selections (#166)
• add enum fallback (#160)

• use latest gql_code_builder
• add type_overrides config to serializer_builder

• use latest gql_code_builder
• add typenames to OperationDefinitionNode

• build var classes for fragments
• build instantiable data classes for fragments

• use built_value for generated classes
• add serializer_builder to aggregate built_value serializers
• remove op builder
• add custom scalar support
• add support for graphql type overrides (necessary for custom scalars)
• add support for custom serializers (necessary for custom scalars)
• add JsonSerializer
• add and automatically apply OperationSerializer

• remove author field from pubspec.yaml
• "generated code" header by @liyuqian

• remove duplicate ast imports

• add __typename field to interface and object types

• escape reserved and private names

• fix schema url bug

• fix nullable url bug

• upgrade package:gql_code_builder
• read source as a tree of SourceNodes
• use allocator to resolve references to other generated files

• upgrade package:gql_code_gen

• Support for fragment builder

• Split off var_builder off of req_builder

• Spun off of package:gql_code_gen