v0.20.0

The plugin now runs in Astro. lit() server-renders and hydrates Lit
components with no other renderer, and litDevtools() brings hot patching and
the Lit panel, opened from Astro's dev toolbar. The Components tab reads
hydration as a state and stops labelling other libraries' elements. The
DevTools now warn when the Lit Inspector extension and the plugin share a page,
and both work there. Nothing needs action to upgrade.

Added

• The plugin runs in Astro, with the Lit panel in the dev toolbar. Add
  litDevtools() from @oddsquad/vite-plugin-lit/astro to your integrations:
  Lit components hot-patch in place, hydrated or not, and the Lit logo in
  Astro's dev toolbar opens the panel on the page you are on.
  LIT_PLUGIN_TIMELINE=false turns the panel off, and the timeline option
  wins over it.
• Lit components render and hydrate in Astro with no other renderer.
  lit() from @oddsquad/vite-plugin-lit/astro server-renders Lit
  components, hydrates them with their array and object props, keeps a
  defer-hydration you wrote until you remove it, and needs no hydrate imports
  in your pages. Components nested in another's shadow root hydrate after a
  view transition too.
• Resize the Lit window in Astro's dev toolbar. Drag the grip in its top
  corner to make it bigger or smaller; the size sticks across page loads, and a
  double click on the grip resets it. The window lines up with where the
  toolbar is docked.
• The DevTools warn when two runtimes share a page. With the Lit Inspector
  extension enabled on a dev server that already runs the plugin, the console
  and the Components tab now say that two runtimes are loaded and that the
  extension should be off for that site, instead of the picker silently doing
  nothing.

Changed

• Hydration state reads as a state. A server-rendered component that has
  hydrated is now marked hydrated instead of SSR, and deferred, not
  hydrated and hydrated show as pills in the Components tree and details,
  with a drop icon that is empty until the element hydrates and filled once it
  has.
• Custom elements from other libraries sit in the tree unmarked. The muted
  not Lit chip is gone from their rows and the details head, so wrappers like
  Astro's islands no longer crowd the tree with labels; the details pane still
  says why they have no properties.
• A component that never upgraded shows one chip, not two. One the server
  rendered was marked both not upgraded and not hydrated, as if hydration
  were still coming; it now carries only not upgraded, whose tooltip says it
  still shows the HTML the server sent.

Fixed

• The Lit Inspector extension works on a dev server that runs the plugin.
  Enabled for such a site, Pick did nothing and threw in the console, and Vite
  DevTools lost the page. The extension's runtime now serves the page and the
  plugin's shares it, so both panels show the tree and Pick works from either.
• The link printed with the DevTools code opens the Lit panel. Without the
  Vite DevTools hub, the #devframe_otp link in the terminal opened your app
  instead of the panel at /__lit/, so you had to type the code; it now opens
  the panel, approved.
• The Lit panel connects on StackBlitz without Vite DevTools. In a
  WebContainer the panel the plugin serves at /__lit/ used to be refused by
  its own socket and never show the page; it now admits StackBlitz's origins.