Added SEMRush to the service provider list.
Added SEMRush to the service provider list.

hslatman/SEOstats,jslyonnais/SEOstats,WebsterFolksLabs/SEOstats,maxyc/SEOstats,MurgaNikolay/SEOstats,hslatman/SEOstats,MurgaNikolay/SEOstats,WebsterFolksLabs/SEOstats,eyecatchup/SEOstats,harikt/SEOstats,jslyonnais/SEOstats