Upgrade to indy-node 1.12.4 and add ledger debug support

[WadeBarnes]

• Fixes an issue with nodes crashing on startup when dealing with large ledgers.
• Adds/updates support for analyzing ledger databases.

Signed-off-by: Wade Barnes wade@neoterictech.ca

[WadeBarnes]

Please merge AFTER merging https://github.com/bcgov/von-network/pull/165