have drone pull git tags

Author: wbh1

.drone.yml

@@ -2,27 +2,37 @@ kind: pipeline
 name: default
 
 steps:
-- name: build
-  image: golang:1.12
-  commands:
-    - make build-all
-  when:
-    branch:
-      - master
-    event:
-      - push
-      - pull_request
-      - tag
+  - name: fetch
+    image: alpine/git
+    commands:
+      - git fetch --tags
+    when:
+      event:
+        - tag
+      branch:
+        - master
 
-- name: publish
-  image: plugins/github-release
-  settings:
-    api_key:
-      from_secret: github_api_key
-    files: dist/*
-  when:
-    event:
-      - tag
-    branch:
-      - master
+  - name: build
+    image: golang:1.12
+    commands:
+      - make build-all
+    when:
+      branch:
+        - master
+      event:
+        - push
+        - pull_request
+        - tag
+
+  - name: publish
+    image: plugins/github-release
+    settings:
+      api_key:
+        from_secret: github_api_key
+      files: dist/*
+    when:
+      event:
+        - tag
+      branch:
+        - master