Add static code analysis to CI test (#1197)

.travis.yml

@@ -15,6 +15,7 @@ cache:
   directories:
     - $HOME/google-cloud-sdk/
     - $HOME/k8scli
+    - $HOME/tool
 
 services:
   - docker
@@ -29,15 +30,16 @@ install:
   - hack/travis-kube-setup.sh
 
 env:
-  - KUBECONFIG=${HOME}/.kube/config PATH=$HOME/k8scli:${PATH} GO111MODULE=on
+  - KUBECONFIG=${HOME}/.kube/config PATH=$HOME/k8scli:$HOME/tool:$HOME/google-cloud-sdk/bin:${PATH} GO111MODULE=on
 
 before_script:
   - cd ${TRAVIS_BUILD_DIR}
+  - go mod download
+  - go mod vendor
+  - hack/verify-staticcheck.sh
   - hack/verify-gofmt.sh
   - hack/verify-govet.sh
   - helm lint charts/fission-all/ charts/fission-core/
-  - go mod download
-  - go mod vendor
   - go build -o cmd/fission-cli/fission ./cmd/fission-cli/
   - hack/runtests.sh