chore(travis): install libvpx on travis for webkit (#1017)

aslushnikov · web-flow · commit bd139e4c748f · 2020-02-14T16:27:16.000-08:00
Fixes #1016
diff --git a/.travis.yml b/.travis.yml
@@ -18,6 +18,7 @@ addons:
       - libevent-2.1-6
       - libnotify4
       - libxslt1.1
+      - libvpx5
     # This is required to run chromium
       - libgbm1
     # this is needed for running headful tests
