Consider noting Community-Spec-1.0 license identifier in repo

[swinslow]

In the SPDX License List v3.15 release this past weekend, the Community Specification License was added with the identifier Community-Spec-1.0:

https://spdx.org/licenses/Community-Spec-1.0.html

Is that something that would be worth noting in this repo, perhaps in the README file?

[mkdolan]

Yes, we should do that.

[jpradocueva]

PR #16 was merged.