v4.1.2

Six fixes, all found by moving a nineteen-screen application
(https://github.com/monzeromer-lab/Halyard) from WebFluent 2 to 4. Nothing
here is breaking.

Fixed

• A store's derived may call an action declared below it. The
  checker inferred each derived value as it met it, so an action declared
  lower in the file read as undeclared (T13) — though a store's members
  are mutually visible and the runtime binds its actions first. Half a
  store's derived values failed to compile for no reason.
• A sort comparator is handed two elements. It was typed like
  map's (element, index), so the second parameter read as a Number
  and a comparator over records failed with T01.
• A layout's arguments read the route's parameters. They were compiled
  with no page parameters in scope, so
  layout: Shell(crumb: "Build {hash}") on /app/builds/:hash compiled
  hash to location.hash.
• A11 resolves an if on a Bool prop from the call. A card that
  titles itself h2 under a page title and h3 inside a section was
  judged on both branches, so the heading-outline lint reported the h3
  one against a page whose call says h2.
• A select's value takes once its options arrive. The runtime applied
  it after the children passed to el(), but codegen appends
  Select.Option children as later statements, so a select bound to state
  still showed its first option.
• An animation the page never painted settles at its end, not its
  start. When the clock ran out, settled() committed the animation's
  current state — and a page that painted no frame is still on its first —
  so a mount animation in a background tab or a prerender left the element
  at opacity: 0 for good.

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Full Changelog: v4.1.1...v4.1.2