fix docs in travis-ci

Author: ocefpaf

.travis.yml

@@ -81,14 +81,18 @@ script:
     fi
 
   - if [[ $TEST_TARGET == 'docs' ]]; then
+      - if [[ -z "$TRAVIS_TAG" ]]; then 
+          DEPLOY_DIR=dev;
+        else
+          DEPLOY_DIR="version-$TRAVIS_TAG";
+        fi
       set -e ;
       conda install doctr ;
       cp examples/Quickstart.ipynb docs/quickstart.ipynb ;
       pushd docs ;
       make clean html linkcheck ;
       popd ;
-      python -m doctr deploy --sync .;
-      python -m doctr deploy --sync --no-require-master  --built-docs docs/_build/html "docs-$TRAVIS_BRANCH" ;
+      python -m doctr deploy --build-tags --key-path github_deploy_key.enc --built-docs docs/_build/html/ $DEPLOY_DIR
     fi
 
 doctr: