Update to node-8.12

[kderme]

Description

Follow up to https://github.com/IntersectMBO/cardano-db-sync/pull/1737 Cherry-picks commit from 13.2.0.2 release branch and updates to node-8.12

Checklist

• [ ] Commit sequence broadly makes sense
• [ ] Commits have useful messages
• [ ] New tests are added if needed and existing tests are updated
• [ ] Any changes are noted in the changelog
• [ ] Code is formatted with fourmolu on version 0.10.1.0 (which can be run with scripts/fourmolize.sh)
• [ ] Self-reviewed the diff

Migrations

• [ ] The pr causes a breaking change of type a,b or c
• [ ] If there is a breaking change, the pr includes a database migration and/or a fix process for old values, so that upgrade is possible
• [ ] Resyncing and running the migrations provided will result in the same database semantically

If there is a breaking change, especially a big one, please add a justification here. Please elaborate more what the migration achieves, what it cannot achieve or why a migration is not possible.

[kderme]

Mostly reviewed at https://github.com/IntersectMBO/cardano-db-sync/pull/1737. Since this pr updates dependencies and takes too long on ci, I'm merging it prematurely to check if ci is fixed on a follow-up pr.