Merge pull request #3861 from morozov/deprecate-version

Deprecated the usage of the Version class

UPGRADE.md

 # Upgrade to 2.11
 
+## Deprecated `Doctrine\DBAL\Version` class
+
+The usage of the `Doctrine\DBAL\Version` class is deprecated as internal implementation detail. Please refrain from checking the DBAL version at runtime.
+
 ## Deprecated `ExpressionBuilder` methods
 
 The usage of the `andX()` and `orX()` methods of the `ExpressionBuilder` class has been deprecated. Use `and()` and `or()` instead.

lib/Doctrine/DBAL/Version.php

@@ -8,6 +8,9 @@ use function version_compare;
 
 /**
  * Class to store and retrieve the version of Doctrine.
+ *
+ * @internal
+ * @deprecated Refrain from checking the DBAL version at runtime.
  */
 class Version
 {