* pref: optimize the count vowels algo
simplify the algo by using regex and String.prototype.match method, and modified the JS Doc
* fix: resolve all requests
* pref: optimize the algo by regex
ignore the useless traverse in best case by the help of regex and String.prototype.replace method
* test: add four new test cases
* Revert "test: add four new test cases"
This reverts commit 4609833da146beafe839682d7558edf9f64c96fc.
* style: fromat with standard js
