* write adequate test for issue #14663
* don't convert int to string if db type of column is numeric (#14663)
* fix bigint schema test for MySql >8.0.17 (#14663)
* Update CHANGELOG.md
* Update CHANGELOG.md
* update phpdoc [ci skip] (#14663)
* refactoring test case to make it clearer [ci skip] (#14663)
* check `int unsigned` in `QueryBuilderTest::testInsertInteger()` (#14663)
* Update Upgrade.md (#14663)
* fix `int unsigned` schema test for MySql >8.0.17 (#14663)
* fix `int unsigned` schema test for MySql <5.7 (#14663)
Co-authored-by: Alexander Makarov <sam@rmcreative.ru>
Co-authored-by: Bizley <pawel@positive.codes>