use deploy_key in travis

.gitignore

@@ -0,0 +1 @@
+.deploy

.travis.yml

@@ -1,12 +1,13 @@
 language: node_js
 node_js:
-  - node
-install:
-  npm install -g redoc-cli
-script:
-  redoc-cli bundle -o gh-pages/index.html api.yml
+- node
+before_install:
+- openssl aes-256-cbc -K $encrypted_222032d3e245_key -iv $encrypted_222032d3e245_iv
+  -in .deploy/id_rsa.enc -out .deploy/id_rsa -d
+install: npm install -g redoc-cli
+script: redoc-cli bundle -o gh-pages/index.html api.yml
 deploy:
-  provider: pages
-  skip_cleanup: true
-  github_token: $GITHUB_TOKEN
+  provider: pages:git
+  edge: true # opt in to dpl v2
   local_dir: gh-pages
+  deploy_key: .deploy/id_rsa