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

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

node_modules/underscore/modules/_getByteLength.js

@@ -0,0 +1,4 @@
+import shallowProperty from './_shallowProperty.js';
+
+// Internal helper to obtain the `byteLength` property of an object.
+export default shallowProperty('byteLength');