Allow custom filter functions as blacklist/whitelist

[fregante]

The selector filters only accept regexes and strings:

css-selector-generator/src/utilities-options.ts

Lines 19 to 20 in 3c5b2c2

	whitelist: [] as Array<CssSelectorMatch>,
	blacklist: [] as Array<CssSelectorMatch>,

css-selector-generator/src/types.ts

Line 4 in 3c5b2c2

export type CssSelectorMatch = RegExp | string

Would you accept a PR to add support for functions? Example:

getCssSelector(
  targetElement,
  { blacklist:
      [
        // ID selector
        '#forbiddenId',

        // predicate function
        selector => !isCoolSelector(selector)
      ]
  }
)

[fczbkk]

Hey @fregante, thanks for the suggestion and for the pull request. In the end, I did not use your pull request, because I wanted to implement it in a slightly different way and I also wanted to add more tests and update documentation.

I have generated v3.6.0, which includes this feature. See:
https://www.npmjs.com/package/css-selector-generator/v/3.6.0#blacklist