Prepare release of CmdStanR v0.7.0

[jgabry]

Submission Checklist

• Run unit tests
• Declare copyright holder and agree to license (see below)

Summary

Preparing for release of v0.7.0

Copyright and Licensing

Please list the copyright holder for the work you are submitting
(this will be you or your assignee, such as a university or company):
Columbia University

By submitting this pull request, the copyright holder is agreeing to
license the submitted work under the following licenses:

• Code: BSD 3-clause (https://opensource.org/licenses/BSD-3-Clause)
• Documentation: CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

[codecov-commenter]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (bc60419) 88.46% compared to head (36f05d3) 88.36%.

❗ Current head 36f05d3 differs from pull request most recent head 9769e8c. Consider uploading reports for the commit 9769e8c to get more accurate results

Files	Patch %	Lines
R/fit.R	50.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #871      +/-   ##
==========================================
- Coverage   88.46%   88.36%   -0.11%     
==========================================
  Files          12       12              
  Lines        4517     4528      +11     
==========================================
+ Hits         3996     4001       +5     
- Misses        521      527       +6     

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[avehtari]

@jgabry can you update this PR with the latest commits in master? Specifically this PR fixes #872, but doesn't include PR #881 which fixes #770, so currently neither master nor this branch is working for me. Pinging also @andrjohns

[jgabry]

@jgabry can you update this PR with the latest commits in master?

Sorry for the delay, should be updated from master now

[jgabry]

I think this is ready to go if the checks that are currently running pass. I'll check back a bit later to see if they were successful (they take a while to run).