excluding publishing on PRs

.drone.yml

@@ -28,6 +28,7 @@ steps:
       event:
         exclude:
           - tag
+          - pull_request
         include:
           - master
 
@@ -43,6 +44,7 @@ steps:
       event:
         exclude:
           - tag
+          - pull_request
         include:
           - master
 
@@ -57,6 +59,8 @@ steps:
     when:
       event:
         - tag
+      exclude:
+        - pull_request
 
 notify:
   image: drillster/drone-email