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

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

node_modules/underscore/modules/unescape.js

@@ -0,0 +1,5 @@
+import createEscaper from './_createEscaper.js';
+import unescapeMap from './_unescapeMap.js';
+
+// Function for unescaping strings from HTML interpolation.
+export default createEscaper(unescapeMap);