Update travis based on docs

https://galaxy.ansible.com/docs/contributing/importing.html#import-roles-via-travis-ci

.travis.yml

@@ -1,28 +1,28 @@
----
-# OS Details
-os: linux
 language: python
-python: '3.8'
+python: "3.8"
 
-cache:
-  pip: true
+# Use the new container infrastructure
+sudo: false
+
+# Install ansible
+addons:
+  apt:
+    packages:
+    - python-pip
 
-# Install ansible and ansible-lint
 install:
+  # Install ansible
   - pip install ansible
-  - pip install ansible-lint
 
-# testing galaxy install and ansible lint
-# more advanced testing is currently handled with
-#  github actions. The gh-actions for our test are there:
-#  https://github.com/roles-ansible and are tagged
-#  with 'github-actions'  --> https://github.com/search?q=topic%3Agithub-actions+org%3Aroles-ansible&type=Repositories
+  # Check ansible version
+  - ansible --version
+
+  # Create ansible.cfg with correct roles_path
+  - printf '[defaults]\nroles_path=../' >ansible.cfg
+
 script:
-  - ansible-lint .
-  - echo -e "\n\n\n\n\nWe use github actions for more detailed tests.\n\nMore details about that in our github repo at:\nhttps://github.com/roles-ansible/role-ranger/actions\n\n\n\n\n\n"
+  # Basic role syntax check
+  - ansible-playbook tests/test.yml -i tests/inventory --syntax-check
 
 notifications:
-  email:
-    on_success: never
-    on_failure: always
   webhooks: https://galaxy.ansible.com/api/v1/notifications/