Update blacklist

[gulp-stubcell](https://github.com/yosuke-furukawa/gulp-stubcell)

* It doesn't use gulp file system.

[gulp-sketch](https://github.com/cognitom/gulp-sketch)

* [It directly passes files paths to the `sketchtool` command arguments.](https://github.com/cognitom/gulp-sketch/blob/2aa692af35c9228ee493b8dd06f0a244d19977da/coffee/index.coffee#L26-L37)
* [It creates a temporary directory outsude the stream.](https://github.com/cognitom/gulp-sketch/blob/2aa692af35c9228ee493b8dd06f0a244d19977da/coffee/index.coffee#L37)