Why is html-minifier telling me : Unknown option `--minifyJS'?

QUESTION:

I installed uglify-js globally and I installed html-minifier.

Minification of HTML works fine but when I add --minifyJS to minify javascript as well, it fails with the following error:

  error: unknown option `--minifyJS'

What have I done wrong ?

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CODE:

html-minifier --input-dir ./viewsCopy --output-dir ./views-minified --collapse-whitespace --html5 --minifyJS=true

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REFERENCE:

https://www.npmjs.com/package/html-minifier

via Coder1000