Storing an empty string and getting it back produce a bad behavior. (quasarframework#1198)

There was a test for considering the value only if it contains at least 10 chars, but 9 is the correct number. As each key plus separator '"__q_strn|".length' contains 9 chars not 10. So getting a value from "__q_strn|" was returning "__q_strn|" instead of "".

Author: erakis

src/plugins/web-storage.js

@@ -31,7 +31,7 @@ function decode (value) {
   let type, length, source
 
   length = value.length
-  if (length < 10) {
+  if (length < 9) {
     // then it wasn't encoded by us
     return value
   }