lib: define FormData and fetch etc. in the built-in snapshot by joyeecheung · Pull Request #51598 · nodejs/node
https://github.com/nodejs/node/pull/51598

v20.11 では起きない

breaking change in 21.7.0 when mocking fetch · Issue #52015 · nodejs/node
https://github.com/nodejs/node/issues/52015

nodejs v20.12.0 でこれ踏んだ気がする

April foolproof