fix(merge): add default value for mergeDirectives
#1671
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The GraphQL reference implementation treats directives as optional, so mergeDirectives needs to handle the `undefined` case, since some libraries will set `directives` to be undefined instead of an empty list. see https://github.com/graphql/graphql-js/blob/20a8f555e7eaa5c2fa2fd188abcef83ee8169e7f/src/language/ast.d.ts#L453
This was referenced Jun 23, 2020
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@rufman Thank you very much!!! |
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The GraphQL reference implementation treats directives as optional,
so mergeDirectives needs to handle the
undefinedcase, since somelibraries will set
directivesto be undefined instead of an empty list.see https://github.com/graphql/graphql-js/blob/20a8f555e7eaa5c2fa2fd188abcef83ee8169e7f/src/language/ast.d.ts#L453
TODO: