CompatHelper: bump compat for Colors to 0.13, (keep existing compat)
This pull request changes the compat entry for the Colors
package from 0.12
to 0.12, 0.13
.
This keeps the compat entries for earlier versions.
Note: I have not tested your package with this new compat entry. It is your responsibility to make sure that your package tests pass before you merge this pull request.