Add node modules and new code for release (#39)

Co-authored-by: tbarnes94 <tbarnes94@users.noreply.github.com>

node_modules/parse5/lib/extensions/error-reporting/mixin-base.js

@@ -0,0 +1,43 @@
+'use strict';
+
+const Mixin = require('../../utils/mixin');
+
+class ErrorReportingMixinBase extends Mixin {
+    constructor(host, opts) {
+        super(host);
+
+        this.posTracker = null;
+        this.onParseError = opts.onParseError;
+    }
+
+    _setErrorLocation(err) {
+        err.startLine = err.endLine = this.posTracker.line;
+        err.startCol = err.endCol = this.posTracker.col;
+        err.startOffset = err.endOffset = this.posTracker.offset;
+    }
+
+    _reportError(code) {
+        const err = {
+            code: code,
+            startLine: -1,
+            startCol: -1,
+            startOffset: -1,
+            endLine: -1,
+            endCol: -1,
+            endOffset: -1
+        };
+
+        this._setErrorLocation(err);
+        this.onParseError(err);
+    }
+
+    _getOverriddenMethods(mxn) {
+        return {
+            _err(code) {
+                mxn._reportError(code);
+            }
+        };
+    }
+}
+
+module.exports = ErrorReportingMixinBase;