Update .travis.yml
Update .travis.yml

Maybe "" is required as it seems --as-cran was still happening, and AppVeyor failing on r-devel only because of needing objdump.exe only when --as-cran?
vlulla/data.table,Rdatatable/data.table,Rdatatable/data.table,Rdatatable/data.table,jangorecki/data.table,jangorecki/data.table,vlulla/data.table,Rdatatable/data.table,vlulla/data.table,jangorecki/data.table,vlulla/data.table,jangorecki/data.table