docs(README): add audit badge and update links

thetutlage · thetutlage · commit a7c1730b2acd · 2020-08-07T13:31:55.000+05:30
diff --git a/npm-audit.html b/npm-audit.html
@@ -427,4 +427,4 @@ <h3>References</h3>
     </script>
 </body>
 
-</html>
+</html>

-Original file line number
+Diff line change
     </script>
 </body>
 -</html>
 +</html>