Doesn't work with grunt-newer

[zipper]

Because grunt-modernizr uses non-standard format for source files definition, it doesn't work with grunt-newer.

Accordion to official documentation, source files can be mapped either by:

1. Compact Format
2. Files Object Format
3. Files Array Format

grunt-modernizr uses neither of them (although (2) is close). As a result, preceding tasks which modifies source (eg. grunt-newer) files causing grunt-modernizr not to work.