Lint broken on node v4

[nfischer]

Node version (or tell us if you're using electron or some other framework)

v4

ShellJS version (the most recent version/GitHub branch you see the bug on)

happening on GitHub Actions CI

Operating system

all

Description of the bug:

/home/runner/work/shelljs-plugin-tr/shelljs-plugin-tr/node_modules/eslint/node_modules/optionator/node_modules/word-wrap/index.js:9
  let lastCharPos = str.length - 1;
  ^^^

SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
    at exports.runInThisContext (vm.js:53:16)
    at Module._compile (module.js:373:25)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:[34](https://github.com/nfischer/shelljs-plugin-tr/actions/runs/7124954173/job/19400042971?pr=10#step:5:35)3:32)
    at Function.Module._load (module.js:300:12)
    at Module.require (module.js:[35](https://github.com/nfischer/shelljs-plugin-tr/actions/runs/7124954173/job/19400042971?pr=10#step:5:36)3:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/home/runner/work/shelljs-plugin-tr/shelljs-plugin-tr/node_modules/eslint/node_modules/optionator/lib/help.js:6:14)
    at Object.<anonymous> (/home/runner/work/shelljs-plugin-tr/shelljs-plugin-tr/node_modules/eslint/node_modules/optionator/lib/help.js:260:4)
    at Module._compile (module.js:[40](https://github.com/nfischer/shelljs-plugin-tr/actions/runs/7124954173/job/19400042971?pr=10#step:5:41)9:26)

See https://github.com/nfischer/shelljs-plugin-tr/actions/runs/7124954173/job/19400042971?pr=10

It looks like one of our dependencies is no longer v4-compatible.

Example ShellJS command to reproduce the error:

npm run lint