Now when golang 1.11 is out, 1.9 and older versions are no longer
supported. More to say, since the archive/tar is from go-1.11, it
uses some features from new Go versions (strings.Builder and sync.Map)
not supported by anything older than Go 1.10.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This is not saying that tar-split no longer works on go1.3 or go1.4, but
rather that the headache of `go vet` having a version dependent ability
to install it, makes it a headache in travis.
Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
