require dash core

[alexcjohnson]

dash should be part of install_requires on the Python side, and suggests in R. Probably >=1.0.0?

[xhluca]

Good idea! I've built dash-deck but didn't think about adding dash as a install_requires in setup.py. Now I realize that it might confuse newcomers if run into errors because they don't have dash installed before running pip install dash-deck.

As for the version, I wonder if it might be worth having the dash-component-boilerplate itself versioned? Once we have dash v2.0.0, do we still want the components created with the boilerplate to be compatible with all of v1.0.0, or would that likely not pose any issue?