v0.3.1

The dateparsa command, prebuilt. No library code changed, and every input
parses to what it did in 0.3.0.

Added

• The dateparsa command. dateparsa detect reports how a column is
  written: the formats its values take, each spelled for strftime, Go and
  Java, the order its numeric dates are in and the value that settled it, the
  values that needed the column's order, and the values it could not read, by
  line. dateparsa normalize writes the input back with the column as RFC
  3339, changing no other byte, and refuses to guess an order nothing in the
  column settles. CSV with --col N or --col NAME (quoted fields, any
  one-byte separator), or one value a line, from a file or standard input;
  --order, --base, --tz, --utc, --locale and detect --json. The
  release archives carry it in bin/ for every platform, and each release
  runs it on Linux, macOS and Windows before publishing.