graphql/graphiql @graphiql/react@0.3.0 on GitHub

#2453 1b41e33c Thanks @thomasheyenbrock! - Add execution context to @graphiql/react and move over the logic from graphiql
#2452 ee0fd8bf Thanks @thomasheyenbrock! - Move tab state from graphiql into editor context from @graphiql/react
#2449 a0b02eda Thanks @thomasheyenbrock! - Assume all context values are nullable and create hooks to consume individual contexts
#2450 1e6fc68b Thanks @thomasheyenbrock! - Extract the copy, merge, prettify, and autoCompleteLeafs functions into hooks and remove these functions from the editor context value

#2451 0659e96e Thanks @thomasheyenbrock! - Always use the current value of the headers for the introspection request