Revert minimum editor version

tests fail, leaving this headache for later

Author: Pauliusd01

Packages/com.unity.inputsystem/package.json

@@ -2,7 +2,7 @@
 	"name": "com.unity.inputsystem",
 	"displayName": "Input System",
 	"version": "1.11.3",
-	"unity": "2021.3",
+	"unity": "2019.4",
 	"description": "A new input system which can be used as a more extensible and customizable alternative to Unity's classic input system in UnityEngine.Input.",
 	"keywords": [
 		"input",