jung-kurt/gofpdf/fpdf depends on sort.SliceStable which was added in 1.8, remove 1.7 from travis tests, add latest 1.10 test env
jung-kurt/gofpdf/fpdf depends on sort.SliceStable which was added in 1.8, remove 1.7 from travis tests, add latest 1.10 test env

iopred/bruxism