do not test puppet less than 3.4 on ruby 2.1.4

Author: Martin Alfke

.travis.yml

@@ -20,6 +20,14 @@ matrix:
       env: PUPPET_VERSION="~> 4.2"
     - rvm: 2.1.4
       env: PUPPET_VERSION="~> 2.7.0"
+    - rvm: 2.1.4
+      env: PUPPET_VERSION="~> 3.0.0"
+    - rvm: 2.1.4
+      env: PUPPET_VERSION="~> 3.1.0"
+    - rvm: 2.1.4
+      env: PUPPET_VERSION="~> 3.2.0"
+    - rvm: 2.1.4
+      env: PUPPET_VERSION="~> 3.3.0"
 sudo: false
 gemfile: .gemfile
 notifications: