Ichiran Postgres database dump (July 2020 update)

This is the first release that includes Japanese municipalities data from the start.

Create a new database from this dump using the following commands:

createdb -E 'UTF8' -l 'ja_JP.utf8' -T template0 <database_name>
pg_restore -C -d <database_name> ichiran-220720.pgdump

Note: run (ichiran/mnt:add-errata) after configuring your ichiran to use this database to get the latest database fixes.