Release 2.2.0

• Compatibility with Shopware 6.6.10.0
• Update Criteria to support partial loading (Criteria.addFields)
• Added Repository::aggregate method to fetch aggregated data
• Fixes #89 Missing associated entities with same type in repository requests
• Fixes #86 Notification classes (definition, entity, collection) are missing
• Fixes #96 Class "Vin\ShopwareSdk\Data\Entity\Custom\CustomDefinition" not found
• Fixes #98 Deleting a Version does not work
• Fixes add custom definition, @see: examples/custom-entity.php for code example
• Throw ShopUnreachableException when the shop server is unreachable
• Fixes Repository.syncDeleted to use the same http client as the repository
• Fixes #87 Extensions not loaded into ProductEntity
• Fixes #50 Work with custom entities
• Fixes #78 Allowed memory size exhausted
• Added #77 Add support for criteria in SyncService / SyncPayload (@see: examples/sync-service.php)