Pin composer image to 1.9 (#217)

HLeithner · web-flow · commit c3f2ef927efe · 2021-06-25T11:18:00.000+02:00
diff --git a/.drone.yml b/.drone.yml
@@ -1,6 +1,6 @@
 pipeline:
   phpcs:
-    image: composer:latest
+    image: composer:1.9
     commands:
       - echo $(date)
       - composer install --prefer-dist --no-progress --no-interaction
