trying again

.drone.yml

@@ -1,13 +1,12 @@
 pipeline:
   build:
-    image: golang:1.5
+    image: ${IMAGE}
-    environment:
-      - GO15VENDOREXPERIMENT=1
-      - CGO_ENABLED=0
     commands:
-      - go test -cover -coverprofile coverage.out
+      - go build
+      - go test
 
-  publish:
+matrix:
-    coverage:
+  IMAGE:
-      when:
+    - golang:1.7
-        branch: master
+    - golang:1.8
+    - golang:latest