Fix bower warning about version #
Fix bower warning about version #

Fixes the following bower warning:

```bower leaflet-omnivore#*      mismatch Version declared in the json (0.2.0) is different than the resolved one (0.3.0)```
gavioto/leaflet-omnivore,mapbox/leaflet-omnivore,mapbox/leaflet-omnivore,gavioto/leaflet-omnivore