I think the emphasis is in 'indiscriminatly'. The goal is not to have absolutely zero dependencies, just don't depend on dependencies that you could reasonably implement yourself.
A classical example might be https://www.npmjs.com/package/is-odd
A classical example might be https://www.npmjs.com/package/is-odd
>>> '13' % 2
0
>>> 'nan' % 2
NaN
>>> NaN % 2
NaN
>>> null % 2
0
Anyway, to include this package as a dependency is indeed overkill. I would most likely opt for vendoring this package into the project (including licenses and acknowledgement), as the code is unlikely to change and is MIT licensed.