support DBAL 3.x

Author: VasekPurchart

composer.json

@@ -14,7 +14,7 @@
 		"php": "^7.2",
 		"consistence/consistence": "^1.0|^2.0",
 		"consistence/consistence-doctrine": "^3.0",
-		"doctrine/dbal": "^2.13.1",
+		"doctrine/dbal": "^2.13.1|^3.0",
 		"symfony/config": "^3.0|~4.0.0|^4.1.4",
 		"symfony/dependency-injection": "^3.0|^4.0",
 		"symfony/http-kernel": "^3.0|^4.0"