Manually merge 2.11.x into 3.0.x

Drop Doctrine\DBAL\Version in favor of Ocramius\PackageVersions

CompositeExpression and()/or() factory methods

Deprecated the usage of the Version class

Remove ExpressionBuilder::andX()/orX()

Specify the platform configuration in composer.json

Reorganize upgrade notes

The changes that have been extracted to the `3.0.x` branch are listed under the "Upgrade to 3.0" section. The rest is moved to "Upgrade to 4.0".

Make CompositeExpression immutable

Deprecate calling QueryBuilder methods with an array argument

Prepare CompositeExpression for immutability

First parameter of ExpressionBuilder::and/or() mandatory

Update Doctrine Coding Standard to 7.0

Rename andX() / orX() methods

Clean up unused variables

expectException() is not static

Introduce properties for SQL parts in QueryBuilder

Added the missing argument type to Connection::executeQuery($types)

Fixed the QueryBuilder::setMaxResults() signature to accept NULL