- some indirect dependencies install @types packages which are not compatible with the older typescript.
- adjusted test's tsconfig to not pick these up automatically, as the actual .d.ts does not depend on these external types.

closes #1658

- adapted code from master to latest yargs (`.option` calls).

```
4.x:
found 188 vulnerabilities (169 low, 4 moderate, 14 high, 1 critical) in 5815 scanned packages

4.x with this PR:
found 32 vulnerabilities (17 low, 1 moderate, 13 high, 1 critical) in 5829 scanned packages
```

- adds full unit tests for all cli options
- demonstrates that nothing changes between minimist and yargs except a minor order change in the --help text
- proves b9c4b25 works the same as before

Co-authored-by: fabb <fabb@users.noreply.github.com>

This reverts commit 738391a.
Think this needs to be left to the release tool :|

Per comment by @ErisDS on the GitHub PR:
#1666 (comment)

- Add spec/tmp directory with .gitkeep file to indicate the folder is intentional
- Add the folder contents to .gitignore
- Use this folder to output the sourcemap file during bin tests. This file is a sideeffect of the main test