travis.yml: add 1.12 to test matrix (#1498)
travis.yml: add 1.12 to test matrix (#1498)


aarzilli/delve,go-delve/delve,go-delve/delve,alexbrainman/delve,derekparker/delve,aarzilli/delve,go-delve/delve,dr2chase/delve,dr2chase/delve,derekparker/delve,go-delve/delve,dr2chase/delve,alexbrainman/delve,aarzilli/delve,aarzilli/delve,derekparker/delve,go-delve/delve,alexbrainman/delve