Updated packages when building the project

[Nayananga]

When I was building the project some errors fixed by these new packages.

[zregvart]

@Nayananga thanks for this.

Can you provide more detail on what failed. Thus far we had no issues that required I can't find that any dependency we currently have requires gulp-autoprefixer or gulp-browserify and you haven't added any code that necessitates those.

We like to use tilde ranges (~) which allows us to get minor version upgrades (bugfixes) rather than caret ranges which can lead to upgrades of major versions which we might not be what we want.

[Nayananga]

I think I may have miss guided the Readme, I thought something missing in the project. Now I completely removed and rebuilt the project with no issues. And I noticed ReadMe has changed comparing to my fork. :)

[zregvart]

OK, cool, glad you got it running, and thanks for raising this pull request. I'll close it as it doesn't seem to be needed.

Thanks!