update-symbols
- Only skip symbol sets if they contain a symbol id that conflicts
with an already scanned symbol set. Standard-scale (48:1) symbols
sets are loaded first, so this results in skipping non-standard
symbol sets, but *only* if they contain conflicting symbol ids.
Previously, we just ignored all non-standard symbol sets.
(Until recently, bale sets for non-standard scales (e.g. 60:1) used
the same symbol ids as the standard scale (48:1) sets. As of
`bh-symbols==1.0.0rc5`, all symbols now have globally unique ids.)
- Do not update unchanged symbols.
- Add `dry-run` option to report which symbols would be updated.
- Report the currently installed version of [bh-symbols].