Update drone config

.drone.yml

@@ -5,8 +5,9 @@ name: default
 steps:
   - name: build
     when: 
-      branch:
-        - main
+      events:
+        - push
+        - pull_request
     image: denoland/deno:alpine
     commands:
       - deno run -A https://deno.land/x/lume@v1.6.4/install.ts
@@ -14,6 +15,8 @@ steps:
 
   - name: publish
     when: 
+      events:
+        - push
       branch:
         - main
     image: appleboy/drone-scp