For a 0.2.2 release

[ablaom]

Bump [compat] MLJModelInterface = "0.4" to address #20

[codecov-commenter]

Codecov Report

Merging #21 (ea6b1c5) into master (f8f2b5b) will not change coverage.
The diff coverage is n/a.

❗ Current head ea6b1c5 differs from pull request most recent head 06d87a7. Consider uploading reports for the commit 06d87a7 to get more accurate results

@@           Coverage Diff           @@
##           master      #21   +/-   ##
=======================================
  Coverage   86.20%   86.20%           
=======================================
  Files           1        1           
  Lines          87       87           
=======================================
  Hits           75       75           
  Misses         12       12           

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