JS: LL1Analyzer passing PredictionContext incorrectly to ATNConfig constructor

The PredictionContext should be passed to the ATNConfig constructor
in the first argument, the params object. Instead, it is being passed
as the second argument which is intended to be the config.

runtime/JavaScript/src/antlr4/LL1Analyzer.js

@@ -145,7 +145,7 @@ LL1Analyzer.prototype.LOOK = function(s, stopState, ctx) {
 // is {@code null}.
 ///
 LL1Analyzer.prototype._LOOK = function(s, stopState , ctx, look, lookBusy, calledRuleStack, seeThruPreds, addEOF) {
-    var c = new ATNConfig({state:s, alt:0}, ctx);
+    var c = new ATNConfig({state:s, alt:0, context: ctx}, null);
     if (lookBusy.contains(c)) {
         return;
     }