[NenkaLab]

What changed

The standard bot module declares its tokens with the new handle type: replyToken as handle<reply>, readToken as handle<read>, image and author.avatar as handle<image>, and the token parameter of reply, markRead and image to match.

A provider written before this declares its tokens as string. So fits accepts a string where the standard has a handle, and such providers keep working.

Why

The host finds the token fields it must wrap from a hard-coded list. With the spec naming them, a later change can read the fields from the spec, so a provider that adds a token field gets the same protection without a host change.

Testing

:contract:test and :tck:test pass. New tests cover the fit rule (a string fits a handle, an int and a different kind do not) and that the standard module marks its tokens.