CLI Flags do not work for nodejs 14

[kevinprotoss]

🐛 Bug Report

• tslint-to-eslint-config version: 1.1.0
• ESLint version: 7.5.0
• Node version: 14.6.0

Actual Behavior

I just used the recommended command npx tslint-to-eslint-config --prettier to convert the lint config. However, I always get the suggestion in the logging message:

☠ Prettier plugins are missing from your configuration. ☠
  We highly recommend running tslint-to-eslint-config --prettier to disable formatting ESLint rules.
  See https://github.com/typescript-eslint/tslint-to-eslint-config/blob/master/docs/FAQs.md#should-i-use-prettier.

Meanwhile, no configurations about prettier would be inserted in the generted .eslintrc.js file.

I wonder what's wrong here. Did I forget some required plugins or install wrong version of those dependencies?
I know some more dependencies are requied here for further use together with eslint. I just want to first make sure the convertion of lint configuration is correct. Unfortunately, it doesn't work for me.

Expected Behavior

No more suggestions in the console message.
Relevant config values for prettier would be added into the .eslintrc.js

Reproduction

Use nodejs 14.6.0

npm install -g @angular/cli
ng new my-dream-app
cd my-dream-app
npm i --save-dev eslint
npx tslint-to-eslint-config --prettier

[JoshuaKGoldberg]

Fascinating. It looks like the options getting parsed aren't including prettier in

tslint-to-eslint-config/src/cli/runCli.ts

Line 38 in b722887

...(command.parse(rawArgv) as Partial<TSLintToESLintSettings>),

.

Switching to using .opts() fixes it. I'll send a PR. Thanks for reporting!