v1.0.4

Public release of GraphQL-core-next, based on GraphQL.js v14.3.0.

In addition to incorporating the latest changes from GraphQL.js
(see the list of changes in GraphQL.js v14.3.0),
which include the addition of a new utility function strip_ignored_characters,
this release also contains the following improvements and changes:

• specified_directives and similar lists are now read only lists (#31)
• introspection_types is now a read only dict
• Minor fixes in the Sphinx docs and some docstrings