Support glob options in assetPattern

[dinony]

Bug Report or Feature Request (mark with an x)

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- [x] feature request

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Desired functionality

Asset pattern supports glob patterns but does not support glob options.

What about something like the following?

{ "glob": "**/*", "globOptions": {"ignore": "src/assets/fonts"}, "input": "src/assets/", "output": "/assets/" }

This would help with file duplication issues.

[clydin]

One potential option is to try a glob with a negation.

However, the underlying issue is that non-assets are being placed within an asset directory. Assets are files that are copied verbatim to the build output. Files that are processed by the build system should not be placed there as they are not intended to be simply copied.