Bump Go version to 1.13 and 1.14

Signed-off-by: Dan Williams <dcbw@redhat.com>

.travis.yml

@@ -3,9 +3,8 @@ sudo: required
 dist: xenial
 
 go:
-  - 1.11.x
-  - 1.12.x
   - 1.13.x
+  - 1.14.x
 
 env:
   global:
@@ -25,10 +24,10 @@ matrix:
   include:
     - os: windows
       env: TARGET=amd64
-      go: 1.11.x
+      go: 1.13.x
     - os: windows
       env: TARGET=amd64
-      go: 1.12.x
+      go: 1.14.x
 
 install:
   - go get github.com/onsi/ginkgo/ginkgo
@@ -36,6 +35,7 @@ install:
   - go get golang.org/x/tools/cmd/cover
   - go get github.com/modocache/gover
   - go get github.com/mattn/goveralls
+  - go mod vendor
 
 script:
  - |