handle mime-types-data issue on travis

Using solution based on info from: - travis-ci/travis-ci#5145 - sj26/mailcatcher#277
lalitkapoor · Jun 5, 2016 · cc9c5be · cc9c5be
1 parent c8af1ef
commit cc9c5be
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,6 @@
 language: ruby
+before_deploy:
+  - gem install mime-types --version "< 3"
 rvm:
   - "2.2.4"
   - "1.9.3"