Update local-dir to relative path (travis-ci/travis-ci#9047).

DavidAntliff · DavidAntliff · commit 30d3bca986de · 2018-01-20T12:21:43.000+13:00
diff --git a/.travis.yml b/.travis.yml
@@ -31,7 +31,7 @@ script:
 deploy:
   provider: pages
   skip_cleanup: true
-  local_dir: $TRAVIS_BUILD_DIR/doc/html
+  local_dir: doc/html
   github_token: $GITHUB_TOKEN
   on:
     branch: master
