Fix type error

[twoeths]

Motivation

Got Cannot export 'AbortSignal'. Only local declarations can be exported from a module error as specified in libp2p/js-libp2p#1073 (comment)

Description

• Do not use aegir to build type
• Declare type ourself as in https://github.com/mysticatea/abort-controller/blob/master/dist/abort-controller.d.ts

[dapplion]

CC @wemeetagain

[JamesEarle]

Following as I'm experiencing this bug

[achingbrain]

I'd rather not use hand-rolled .d.ts files as they aren't checked by linting tools and we've previously shipped broken .d.ts files by accident because of this.

AbortController and AbortSignal are supported globally by node 14+ so this module shouldn't be necessary any more?

[achingbrain]

Tracking issue for removing this module from the ipfs/libp2p stacks: ipfs/js-ipfs#4001