docket 0.18.0

Changed

• 0.17.1 shipped docket graph --format csv under a patch number, which
  understates it. This release carries the same feature under a minor version,
  so a reader comparing version numbers is not misled about what changed.

Fixed

• A rolled changelog heading got two blank lines under it, because the captured
  section already opens with the blank line that followed ## [Unreleased].
• just release restores VERSION, the changelog and both plugin manifests when
  it aborts. The bump has to precede the test, because a test compares the
  running --version against VERSION, so a failing test left a half-applied
  bump behind with nothing saying how to undo it.

Documentation

• The docket skill now covers graph --format: the three shapes, what each
  one is for, and the flags that narrow all of them.