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)

backport of node-fetch#1449 (node-fetch#1453)

* backport of node-fetch#1449

* bump patch version

release minor change (3.1.0) (node-fetch#1364)

fix(URL): prefer built in URL version when available and fallback to …

…whatwg (node-fetch#1352)

* fix(URL): prefer built in URL version when available and fallback to whatwg

* bump minor

fix: import whatwg-url in a way compatible with ESM Node (node-fetch#…

…1303)

* fix: import whatwg-url in a way compatible with ESM Node

* release: 2.6.5

fix: properly encode url with unicode characters (node-fetch#1291)

* fix: properly encode url with unicode characters
* release: 2.6.3

Fix(package.json): Corrected main file path in package.json (node-fet…

…ch#1274)

* fix main configuration in package.json
* pinned a breaking change in codecov & teeny-request

V3 stable release (node-fetch#1257)

* making v3 stable