Add test for view build files

.travis.yml

@@ -15,13 +15,12 @@ install:
   - # skip
 
 script:
-  - go mod download
-  - go mod verify
   - go get ./...
   - diff -u <(echo -n) <(gofmt -d .)
   - go test -v -race ./...
   # Only build binaries from the latest Go release.
   - if [ "${LATEST}" = "true" ]; then gox -os="linux" -arch="amd64" -output="concron.." -ldflags "-X main.Rev=`git rev-parse --short HEAD`" -verbose ./src/; fi
+  - ls -la
 
 deploy:
   provider: releases