add twine dep and remove unneeded install steps

Author: rmorshea

.travis.yml

@@ -38,9 +38,5 @@ jobs:
     if: tag IS present AND repo = rmorshea/idom
     python: 3.6
     script:
-    - sudo apt update
-    # javascript dependencies
-    - sudo apt install nodejs
-    - npm install -g yarn
     - python setup.py bdist_wheel
     - twine upload dist/* -u $PYPI_USERNAME -p $PYPI_PASSWORD

requirements/dev.txt

@@ -1,3 +1,4 @@
 jupyter
 pre-commit
 notebook
+twine