.travis.yml in pycall-0.1.0.alpha vs .travis.yml in pycall-0.1.0.alpha.20170224b

@@ -1,5 +1,19 @@
 sudo: false
 language: ruby
+
 rvm:
+  - 2.1.10
+  - 2.2.5
   - 2.3.1
-before_install: gem install bundler -v 1.13.2
+  - ruby-head
+
+addons:
+  apt:
+    packages:
+      - python3
+      - python3-dev
+      - python3-all
+
+before_install:
+  - gem update --system
+  - gem update bundler