Fix version in readme

[domoritz]

Closes #364

[codecov-commenter]

Codecov Report

Merging #365 (9eb5207) into master (94a82cd) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #365   +/-   ##
=======================================
  Coverage   82.60%   82.60%           
=======================================
  Files         162      162           
  Lines       44175    44175           
=======================================
  Hits        36491    36491           
  Misses       7684     7684           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 94a82cd...9eb5207. Read the comment docs.

[alamb]

👍 Thanks

[alamb]

MIRI failure is unrelated to this PR