fix: config v2 warn

Author: irfan-maulana-tkp

.travis.yml

@@ -1,3 +1,4 @@
+os: linux
 language: node_js
 node_js: '12'
 branches:
@@ -20,10 +21,10 @@ after_script:
   - codecov
 deploy:
   provider: pages
-  skip-cleanup: true
-  github-token: $GITHUB_TOKEN
-  keep-history: true
-  local-dir: dist
+  skip_cleanup: true
+  token: $GITHUB_TOKEN
+  keep_history: true
+  local_dir: dist
   verbose: true
   on:
     branch: master