backport parser typescript type-definitions for 15.x.x release#3251

IvanGoncharov merged 1 commit intographql:15.x.xgraphql/graphql-js:15.x.xfrom

n1ru4l:backport-parser-defs-15.x.xn1ru4l/graphql-js:backport-parser-defs-15.x.xCopy head branch name to clipboard