Function isRegExp

isRegExp(input): input is RegExp
instanceof RegExp alias.

Example
```
isRegExp(new RegExp("-")); // true
isRegExp(/-/); // true
isRegExp("Vangware"); // false
```
Parameters
- input: unknown
Returns input is RegExp
true if the given value is an instance of RegExp, false otherwise.
- Defined in work/predicates/predicates/src/isInstanceOf.ts:18