.travis.yml in qonfig-0.11.0 vs .travis.yml in qonfig-0.12.0

@@ -1,14 +1,38 @@
 language: ruby
 matrix:
   fast_finish: true
   include:
   - rvm: 2.3.8
+    gemfile: gemfiles/with_external_deps.gemfile
+    env: TEST_PLUGINS=true
   - rvm: 2.4.6
+    gemfile: gemfiles/with_external_deps.gemfile
+    env: TEST_PLUGINS=true
   - rvm: 2.5.5
+    gemfile: gemfiles/with_external_deps.gemfile
+    env: TEST_PLUGINS=true
   - rvm: 2.6.3
+    gemfile: gemfiles/with_external_deps.gemfile
+    env: TEST_PLUGINS=true
   - rvm: ruby-head
+    gemfile: gemfiles/with_external_deps.gemfile
+    env: TEST_PLUGINS=true
   - rvm: jruby-head
+    gemfile: gemfiles/with_external_deps.gemfile
+    env: TEST_PLUGINS=true
+  - rvm: 2.3.8
+    gemfile: gemfiles/without_external_deps.gemfile
+  - rvm: 2.4.6
+    gemfile: gemfiles/without_external_deps.gemfile
+  - rvm: 2.5.5
+    gemfile: gemfiles/without_external_deps.gemfile
+  - rvm: 2.6.3
+    gemfile: gemfiles/without_external_deps.gemfile
+  - rvm: ruby-head
+    gemfile: gemfiles/without_external_deps.gemfile
+  - rvm: jruby-head
+    gemfile: gemfiles/without_external_deps.gemfile
   allow_failures:
   - rvm: ruby-head
   - rvm: jruby-head
 sudo: false
 cache: bundler