update version and copyright date

[apcraig]

PR checklist

• [X] Short (1 sentence) summary of your PR: Update version and copyright date in preparation for release
• [X] Developer(s): apcraig
• [X] Suggest PR reviewers from list in the column to the right.
• [X] Please copy the PR test results link or provide a summary of testing completed below. No code changed, but tested on cheyenne anyway, all bit-for-bit, https://github.com/CICE-Consortium/Test-Results/wiki/icepack_by_hash_forks#19d97451df015c4b5796f61583cf3e0c51ff7f2d
• How much do the PR code changes differ from the unmodified code?
  • [X] bit for bit
  • [ ] different at roundoff level
  • [ ] more substantial
• Does this PR create or have dependencies on CICE or any other models?
  • [ ] Yes
  • [X] No
• Does this PR add any new test cases?
  • [ ] Yes
  • [X] No
• Is the documentation being updated? ("Documentation" includes information on the wiki or in the .rst files from doc/source/, which are used to create the online technical docs at https://readthedocs.org/projects/cice-consortium-cice/.)
  • [X] Yes
  • [ ] No, does the documentation need to be updated at a later time?
    • [ ] Yes
    • [ ] No
• [ ] Please provide any additional information or relevant details below:

[apcraig]

We still need to update LICENSE.pdf. Would like to do that in this PR or have a plan for doing so if not in this PR.

[eclare108213]

I updated the license pdfs directly. Should have sent them to you to include here, but they're already done.