- do not allow boolean values for integer columns
- use native boolean type with boolean values
- removed workaround that turned out to be wrong when schema and values
  are used correctly. Workaround resulted from wrong usage of boolean
  values before.

fixes #4672

Fixes #4697: MSSQL query builder does not work for newer MSSQL versions when LIMIT is used without ORDER BY

Fixes #4607: AR model will throw an exception if it does not have a primary key to avoid updating/deleting data massively

[ci skip]

Fixes #4586: Signed bigint and unsigned int will be converted into integers when they are loaded from DB by AR

also fixed an issue with default value loading of bool columns.

fixes #3489, fixes #4085, fixes #3920
related to #4672

fixes #4654

Fixes #4644: Added `\yii\db\Schema::createColumnSchema()` to be able to customize column schema used

Added support for arbitrary operators to Query::filterWhere, added support for arbitrary operators to Sphinx extension

check with Object::canSetProperty()

fixes #4305, close #4211

how did that manage to pass before...?

fixes #3026

fixes #1249

Fixes #4051: Renamed `yii\caching\GroupDependency` to `TagDependency` and added support for associating multiple tags to a single cached data item