What configuration options does the slugify function accept?

The slugify function accepts the following configuration options via an options object [index.js:L46-L58]:

1. separator (string, default: '-') — The character used to separate words in the slug.

2. lowercase (boolean, default: true) — Converts the slug to lowercase.

3. decamelize (boolean, default: true) — Converts camelCase to separate words (e.g., fooBar → foo bar).

4. customReplacements (Array<string[]>, default: [['&', ' and '], ['🦄', ' unicorn '], ['♥', ' love ']]) — Custom character/string replacements applied before other transformations.

5. preserveLeadingUnderscore (boolean, default: false) — Preserves a leading underscore if the input string starts with one.

6. preserveTrailingDash (boolean, default: false) — Preserves a trailing dash if the input string ends with one [index.d.ts:L121-L130].

7. preserveCharacters (string[], default: []) — An array of characters to preserve in the output. Cannot include the separator character [index.d.ts:L133-L143].

8. transliterate (boolean, default: true) — Whether to transliterate Unicode characters to ASCII. When false, non-ASCII characters are preserved instead [index.js:L65-L75].

9. locale (string, default: undefined) — The locale for language-specific transliteration, passed to the underlying transliterate function.

FOLLOW_UPS:

• How does the customReplacements option work exactly?
• What happens when transliterate is set to false?
• Can you show an example with preserveCharacters?