Always fetch tags in drone when building

.drone1.yml

@@ -22,8 +22,6 @@ steps:
     image: docker:git
     commands:
       - git fetch --tags
-    when:
-      event: [ tag ]
 
   - name: build
     image: vikunja/golang-build:latest
@@ -137,6 +135,12 @@ trigger:
     - push
 
 steps:
+  # Needed to get the versions right as they depend on tags
+  - name: fetch-tags
+    image: docker:git
+    commands:
+      - git fetch --tags
+
   - name: before-static-build
     image: karalabe/xgo-latest:latest
     pull: true