Merge pull request #100 from scala-steward/update/sbt-sonatype-3.8

Update sbt-sonatype to 3.8

Merge pull request #84 from scala-steward/update/sbt-codacy-coverage-…

…3.0.2

Update sbt-codacy-coverage to 3.0.2

Merge pull request #59 from picnicml/fix/license

Change license from MIT to Apache 2.0

don't copy data in the most frequent value imputer

update readme

make sure all preprocessors only transform features with compatible t…

…ypes

refactor test messages

Merge pull request #42 from picnicml/enh/misc

Minor hyperparameter search improvements

Merge pull request #42 from picnicml/enh/misc

Minor hyperparameter search improvements

Merge pull request #40 from picnicml/enh/read-csv

Implement the csv reading functionality