Function includesIgnoreCase

includesIgnoreCase(text?, comparison?): boolean
Returns whether the given text includes the comparison string, case-insensitive
Parameters
- Optionaltext: null | string
  the source string to check
- Optionalcomparison: null | string
  the target string to compare
Returns boolean
whether the given text includes the comparison string, case-insensitive
Example
```
includesIgnoreCase('foobar', 'FOO');    // true
```