Updated some dev dependencies in package.json
Updated some dev dependencies in package.json

* browserify
* del
* gulp
* gulp-autoprefixer
* gulp-cache
* gulp-csso
* gulp-filter
* gulp-flatten
* gulp-if
* gulp-jshint
* gulp-minify-html
* gulp-size
* gulp-sourcemaps

dmgress/cloudgrapher,dmgress/cloudgrapher