RangeValidator typo fix

fixes #3539

```
vendor/bin/indent --spaces -r framework/
vendor/bin/indent --tabs -r . --pattern=*.json
vendor/bin/indent --spaces -r . --pattern=*.md
vendor/bin/indent --spaces -r . --pattern=yii.*.js
vendor/bin/indent --spaces -r . --pattern=*.css
```

fixes #3555

[WIP] Additional RangeValidator fixes

fixes #3551

Improve `in` validator to properly support array attributes.

Issue #3532: Add note about AR default values to upgrade notes

Hide output in LinkPager when only one page exist

[WIP] #3527 Improving Elasticsearch extension