.travis.yml in vips-8.8.0.3 vs .travis.yml in vips-8.8.2

@@ -22,13 +22,14 @@
       - libpoppler-glib-dev
       - librsvg2-dev
       - libwebp-dev
   homebrew:
     packages:
-      # A simple way to install all dependencies.
-      - vips
       - glib
+      - libffi
+      - libexif
+    update: true
 
 cache:
   bundler: true
   directories: $HOME/vips/ext
 
@@ -37,9 +38,10 @@
     - rvm: 2.4
     - rvm: 2.5
     - rvm: 2.6
     - rvm: 2.6
       os: osx
+      env: PKG_CONFIG_PATH="/usr/local/opt/libffi/lib/pkgconfig"
     - rvm: truffleruby
     - rvm: jruby-head
     - rvm: ruby-head
   allow_failures:
     - rvm: truffleruby