test create with custom moduleName

covers extra breaking mutation 2.1 from PR #87:

diff --git a/lib/normalized-options.js b/lib/normalized-options.js
index 6286419..59a8c95 100644
--- a/lib/normalized-options.js
+++ b/lib/normalized-options.js
@@ -16,7 +16,7 @@ module.exports = (options) => {
     throw new TypeError("Please write your library's name");
   }

-  const moduleName = options.moduleName;
+  const moduleName = null;

   // OPTIONS NOT DOCUMENTED, not supported by CLI:
   const className = options.className;

Author: Christopher J. Brody