"AbortController is not defined" error on Node 14

[vlukashov]

Describe the bug
Running any CLI based on @oclif/core 2+ on Node 14 consistenly fails with "ReferenceError: AbortController is not defined" in some cases.

To Reproduce
Steps to reproduce the behavior:

1. create a new oclif CLI with npx oclif generate my-oclif-core2-cli
2. install the latest Node 14 with nvm install 14 && nvm use 14
3. run the hello command when the terminal is not interactive: head -n1 package.json | bin/dev hello -f NodeJS
4. See the error

ReferenceError: AbortController is not defined
    at /path/to/my-oclif-core2-cli/node_modules/@oclif/core/lib/parser/parse.js:28:20
    at new Promise (<anonymous>)
    at readStdin (/path/to/my-oclif-core2-cli/node_modules/@oclif/core/lib/parser/parse.js:26:12)
    at Parser._args (/path/to/my-oclif-core2-cli/node_modules/@oclif/core/lib/parser/parse.js:275:35)
    at Parser.parse (/path/to/my-oclif-core2-cli/node_modules/@oclif/core/lib/parser/parse.js:161:43)
    at Object.parse (/path/to/my-oclif-core2-cli/node_modules/@oclif/core/lib/parser/index.js:18:33)
    at Hello.parse (/path/to/my-oclif-core2-cli/node_modules/@oclif/core/lib/command.js:193:38)
    at Hello.run (/path/to/my-oclif-core2-cli/src/commands/hello/index.ts:28:40)
    at Hello._run (/path/to/my-oclif-core2-cli/node_modules/@oclif/core/lib/command.js:107:33)

Expected behavior
The CLI should produce the same output on Node 14 as it does on Node 16 or newer:

$ head -n1 package.json | bin/dev hello -f NodeJS
hello { from NodeJS! (./src/commands/hello/index.ts)

Screenshots

Environment (please complete the following information):

• MacOS Monterey
• zsh 5.8.1

Additional context
The root cause seems to be in using the AbortController API assuming that it's always available. However, this API was added in Node 15 and is not available in Node 12 and 14. Since oclif claims to support Node 12+ it should either load an AbortController API polyfill or stop using this API.

[shazron]

It looks like version 2.9.x of @oclif/core does not support node-14 anymore, without making it a major version bump. See #737

@mshanemc @jdxcode

[git2gus]

This issue has been linked to a new work item: W-13823076