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

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

node_modules/underscore/cjs/_getByteLength.js

@@ -0,0 +1,6 @@
+var _shallowProperty = require('./_shallowProperty.js');
+
+// Internal helper to obtain the `byteLength` property of an object.
+var getByteLength = _shallowProperty('byteLength');
+
+module.exports = getByteLength;