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

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

node_modules/cssstyle/lib/properties/marginLeft.js

@@ -0,0 +1,13 @@
+'use strict';
+
+var margin = require('./margin.js');
+var parsers = require('../parsers.js');
+
+module.exports.definition = {
+  set: parsers.subImplicitSetter('margin', 'left', margin.isValid, margin.parser),
+  get: function() {
+    return this.getPropertyValue('margin-left');
+  },
+  enumerable: true,
+  configurable: true,
+};