Modify 2.3.1 version entry

Author: jcalcaben

magento-compatibility.js

@@ -4,6 +4,6 @@
 
 // PWA Studio version -> Magento version.
 module.exports = {
-    '>2.0.0': '2.3.1',
+    '>2.0.0': '>=2.3.1',
     '2.0.0': '2.3.0'
 };