promoting some package managers to "supported"
promoting some package managers to "supported"

in the README

joemoore/LicenseFinder,pivotal/LicenseFinder,tinfoil/LicenseFinder,pivotal/LicenseFinder,tinfoil/LicenseFinder,bspeck/LicenseFinder,bdshroyer/LicenseFinder,SimantovYousoufov/LicenseFinder,SimantovYousoufov/LicenseFinder,pivotal/LicenseFinder,tinfoil/LicenseFinder,bspeck/LicenseFinder,sschuberth/LicenseFinder,sschuberth/LicenseFinder,pivotal/LicenseFinder,joemoore/LicenseFinder,bspeck/LicenseFinder,sschuberth/LicenseFinder,joemoore/LicenseFinder,bdshroyer/LicenseFinder,pivotal/LicenseFinder,bspeck/LicenseFinder,tinfoil/LicenseFinder,bspeck/LicenseFinder,bdshroyer/LicenseFinder,joemoore/LicenseFinder,bdshroyer/LicenseFinder,SimantovYousoufov/LicenseFinder,SimantovYousoufov/LicenseFinder,SimantovYousoufov/LicenseFinder,pivotal/LicenseFinder,sschuberth/LicenseFinder,tinfoil/LicenseFinder,bdshroyer/LicenseFinder,sschuberth/LicenseFinder,joemoore/LicenseFinder,pivotal/LicenseFinder