Put doctrine/lexer:^2.0 back

Author: ondrejmirtes

composer.json

@@ -24,7 +24,7 @@
 		"doctrine/collections": "^2.1",
 		"doctrine/common": "^2.7 || ^3.0",
 		"doctrine/dbal": "^3.3.8",
-		"doctrine/lexer": "^3.0",
+		"doctrine/lexer": "^2.0 || ^3.0",
 		"doctrine/mongodb-odm": "^2.4.3",
 		"doctrine/orm": "^2.16.0",
 		"doctrine/persistence": "^2.2.1 || ^3.2",