As you can see from the - lines in the API diff, there is no reduction
in API surface (we just remove the T:Tag bound from the sha256t::Tag
type, which is not strictly necessary but maybe we would prefer to keep).
We would like to check for API changes during development and in CI so
that such changes can be discussed separately from the code.
Add tooling and documentation for creating API listings for the public
crates within the workspace (i.e., not `internals`).
Add API text files from an initial run of the script.
Andrew Poelstra
Tobin C. Harding
Nick Johnson