Add more Node versions to Travis

Author: rubensworks

.travis.yml

@@ -6,6 +6,8 @@ matrix:
   include:
     - node_js: '10'
     - node_js: '12'
+    - node_js: '14'
+    - node_js: 'lts/*'
     - node_js: 'node'
       env: DOCUMENTATION_BUILD=true DOCKER_BUILD=true
 install: yarn install --pure-lockfile