Add SkipAutomaticTags to PSGalleryModule.

[JosephMcEvoy]

By default, Publish-Module adds tags for every given function in a module. The SkipAutomaticTags parameter allows the user to skip this.

I am new to contributing to this project. I understand my change should allow for the SkipAutomaticTags parameter to be added to WithOptions, which will pass it to the PSGalleryModule script then Publish-Module.