ci: run tests on all commits, release only on tags

.drone.yml

@@ -4,6 +4,7 @@ name: go-lib/util
 
 trigger:
   event:
+    - push
     - tag
   ref:
     - refs/tags/v*
@@ -26,6 +27,8 @@ steps:
   commands:
     - tar czf .build/sources.tar.gz --exclude=.build --exclude=.git --exclude=.drone.yml .
   when:
+    event:
+      - tag
     status:
       - success
 
@@ -40,5 +43,7 @@ steps:
     title: ${DRONE_TAG}
     note: "Release ${DRONE_TAG}\n\nCoverage report: coverage.txt"
   when:
+    event:
+      - tag
     status:
       - success