.travis.yml in assembly-objectfile-1.6.7 vs .travis.yml in assembly-objectfile-1.6.8

@@ -1,6 +1,9 @@
 notifications:
   email: false
-
+addons:
+  apt:
+    packages:
+    - libimage-exiftool-perl
 rvm:
-  - 1.9.3
-  - 2.0.0
+  - 2.2.5
+  - 2.3.1