[Analyzer] Broken manifest with new decorator standard "accessor" keyword

[brian-patrick-3]

Since upgrading to Lit 3.x and migrating all of our decorators to the new standard which requires the accessor keyword in front, the analyzer is unable to build my manifest properly. This is problematic because now a bunch of private properties marked @internal or @ignore are now showing up in our Storybook docs. Ex:

  /** Some private property.
   * @internal
   */
  @state()
  accessor _prop!: string;

[thepassle]

Whats the problem? Do you see any errors? Or it just doesnt output the properties?

[thepassle]

I see what's happening. The version of ts that the analyzer uses doesn't support the accessor keyword yet (it was introduced in 4.9.0). Updating the ts version to 4.9.0 breaks a bunch of tests, because apparently they changed the way how decorators are represented in the AST, so this will take a little bit of reworking. Ill try to take a stab at it this week, or feel free to create a PR if you need it sooner :)

[thepassle]

Ive updated the internally used TS version to 5.4.2, so I expect that this will be fixed in that version. I released it as 0.9.4. Please feel free to reopen if the issue persists :)

[brian-patrick-3]

@thepassle Thank you so much, saved me a lot of headache this morning!