change README.md with a quote at the top telling that the package is deprecated because the functionality can now easily be achieved directly through reading from the MDX v2 AST.
merge and publish together with MDX v2
I or nicola go to npmjs.com and change the package to deprecated (optional)
new PR, removing the code. The final NPM release will point to the tag that is the last code version
how to handle the deprectaiton of gatsby-transformer-mdx-introspection package Suggestion: