supported "as" for pkg alias

Convert to camel case when call it
html-minifier as minHtm',//call it by pkg.minHtm()

Example:
gulp-name -> pkg-name / call-name
* gulp-uglify -> 'uglify' / uglify()
* gulp-minify-css -> 'minify-css' / minifyCss()              //MUST call it by pkg.minifyCss()
* gulp-html-minifier -> 'html-minifier as minHtm' / minHtm() //call it by pkg.htmlMinifier() DOESN'T work!