fix: don't uppercase unknown methods (node-fetch#1542)

* fix: don't uppercase unknown methods

fix: handle bom in text and json (node-fetch#1482)

* fix: handle bom in text and json

* add test for text and arraybuffer as well

fix: add missing formdata export to types (node-fetch#1518)

* fix: add missing formdata export to types

closes node-fetch#1517 1517

fix: cancel request example import (node-fetch#1513)

* Fix example

* Fix formatting

Co-authored-by: Linus Unnebäck <[email protected]>

Co-authored-by: Linus Unnebäck <[email protected]>

chore: completely remove support for form-data package (node-fetch#1486)

BREAKING CHANGE: the `form-data` package is no longer supported

It now needs a spec compatible FormData to be sent

chore: remove EventTarget from the isAbortSignal (node-fetch#1490)

BREAKING CHANGE: when checking if something is a AbortSignal we no longer check if name match EventTarget

chore: completely remove `.buffer()` (node-fetch#1485)

BREAKING CHANGE: `body.buffer()` has been removed

drop support for Node 12

drop support for Node 12

BREAKING CHANGE: drop support for Node 12

feat: export Blob, File and FormData + utilities (node-fetch#1463)

* feat: export FormData, Blob and Files

* use import from index instead

* sort a-z

* explicit export

* bump version

* xo lint

3.1.1 release (node-fetch#1451)