add typescript to devDependencies
add typescript to devDependencies

jupyter/jupyter-js-output-area,jasongrout/jupyter-js-output-area,blink1073/jupyter-js-output-area,jupyter/jupyter-js-output-area,blink1073/jupyter-js-output-area,jupyter/jupyter-js-output-area,jasongrout/jupyter-js-output-area,jupyter/jupyter-js-output-area