0.2.11: Introduce the FieldExecutionStrategy protocol (#14)

* Introduce the FieldExecutionStrategy protocol

* Make `resolveField` public so that it can be used by others

0.2.10

Make GraphQLUnionType init public (#11)

0.2.9

Prevent Token linked list from leaking. (#10)

0.2.7

improve type safety

0.2.6: Fix bad merge (#4)

* Improve type safety

* fix bad merge

0.2.5

Improve type safety (#3)

0.1.0

remove unnecessary code