Add node modules and new code for release (#57)

Co-authored-by: taakleton <taakleton@users.noreply.github.com>

node_modules/parse5/lib/extensions/location-info/open-element-stack-mixin.js

@@ -0,0 +1,35 @@
+'use strict';
+
+const Mixin = require('../../utils/mixin');
+
+class LocationInfoOpenElementStackMixin extends Mixin {
+    constructor(stack, opts) {
+        super(stack);
+
+        this.onItemPop = opts.onItemPop;
+    }
+
+    _getOverriddenMethods(mxn, orig) {
+        return {
+            pop() {
+                mxn.onItemPop(this.current);
+                orig.pop.call(this);
+            },
+
+            popAllUpToHtmlElement() {
+                for (let i = this.stackTop; i > 0; i--) {
+                    mxn.onItemPop(this.items[i]);
+                }
+
+                orig.popAllUpToHtmlElement.call(this);
+            },
+
+            remove(element) {
+                mxn.onItemPop(this.current);
+                orig.remove.call(this, element);
+            }
+        };
+    }
+}
+
+module.exports = LocationInfoOpenElementStackMixin;