update linux travis

inkless · inkless · commit c6d78ed315e6 · 2018-10-24T23:56:17.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -13,6 +13,8 @@ matrix:
       dist: trusty
       language: node_js
       node_js: "10"
+      before_install:
+        - sudo apt-get install libpng16-dev
 
 # npm ci does not work with this
 cache:
