Added besttoolbars to lib whitelist
Added besttoolbars to lib whitelist

mstriemer/amo-validator,mozilla/amo-validator,diox/amo-validator,mstriemer/amo-validator,wagnerand/amo-validator,wagnerand/amo-validator,mstriemer/amo-validator,diox/amo-validator,wagnerand/amo-validator,diox/amo-validator,mozilla/amo-validator,wagnerand/amo-validator,mstriemer/amo-validator,diox/amo-validator,mozilla/amo-validator,mozilla/amo-validator