Update README.md

Author: a8m

README.md

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 #Angular-filter   [![NPM version][npm-image]][npm-url] [![Build status][travis-image]][travis-url] [![Test coverage][coveralls-image]][coveralls-url] [![License][license-image]][license-url]
->Bunch of useful filters for AngularJS (with no external dependencies!), **v0.5.3**
+>Bunch of useful filters for AngularJS (with no external dependencies!), **v0.5.4**
 
 **Notice:** if you want to use `angular-filter` out of AngularJS(e.g: Node, etc..), check [Agile.js repo](https://github.com/a8m/agile)