Provisional LICENSE Update

[jarq6c]

Related to 7519e7d

Opening and pinning this issue to track as more information is learned on this topic. This may have implications on versioning hydrotools packages. Minimally, I think a change in license justifies a major release. Note that it's currently unclear where this new requirement is coming from. It could be anywhere in the OWP-NOAA-DOC chain.

@aaraney @hellkite500 Thoughts?

[jarq6c]

With these PRs, I think the repo is ready to transition to the new license, whenever we get the final signed version of the policy.
PRs #261 #262 #263 #264 #265 #266 #267 #268 #269 #270

The plan is to bump all subpackages up to the next major version and pin a release as hydrotools v3.0.0 with the new license.

[jarq6c]

Also note that 7519e7d was reverted back to the original license due to ambiguities with how the actual language is supposed to appear in the new license.