Format Date 'yy' causing error

getYear() deprecated. Use the getFullYear() method instead
Update README.md
Merge branch 'master' of https://github.com/sjmcpherso/bootstrap-datetimepicker into sjmcpherso-master

Fix for Format Date 'yy' issue where getYear Depreciated
[or undefined method getUTCYear is used]
removed getUTCYear

after previous previous merge getUTCFullYear is used. No method named getUTCYear exists and the code line was unreachable after previous merge.
Merge branch 'master' of https://github.com/tarruda/bootstrap-datetimepicker