111.08.00

- Added `Hashtbl.for_all` and `for_alli`.
- Added `Float.to_padded_compact_string` for converting a floating point
  number to a lossy, compact, human-readable representation.

    E.g., `1_000_001.00` becomes `"1m "`.

- Tweaked the form of the definition of `Blang.Stable.V1`.

    Removed a `type t_` that is not necessary now that we can use `nonrec`
    without triggering spurious warnings.