.travis.yml in rbnacl-3.2.0 vs .travis.yml in rbnacl-3.3.0

@@ -1,14 +1,20 @@
 script: bundle exec rake ci
 
 rvm:
   - 2.0.0
-  - 2.1.4
-  - 2.2.2
+  - 2.1.8
+  - 2.2.4
+  - 2.3.0
   - ruby-head
   - jruby
+  - jruby-9.0.4.0
   - jruby-head
   - rbx-2
+
+env:
+  - LIBSODIUM_VERSION=1.0.0 # Minimum supported
+  - LIBSODIUM_VERSION=1.0.8 # Latest released
 
 matrix:
   fast_finish: true
   allow_failures:
     - rvm: ruby-head