Use a feature branch of cardano-base

This uses the version of cardan-base in the 1.29.0 tag with the three
commits from github PR IntersectMBO#236 in cardano-base. The feature branch is named
release/1.30.0-min.

allow protocol version 6

(cherry picked from commit 53d6176)

Merge IntersectMBO#3225

3225: changelogs and version bumps for release 1.30.0 r=disassembler a=kantp



Co-authored-by: Nicholas Clarke <nick@topos.org.uk>
Co-authored-by: Philipp Kant <philipp.kant@iohk.io>

Merge IntersectMBO#3210

3210: Update dependencies r=nc6 a=nc6

This PR pulls in a number of key changes:

- IntersectMBO/cardano-base#232 changes the in-memory hash representation to reduce memory usage.
- IntersectMBO/cardano-base#236 fixes a potential concurrency issue in key generation, and adds some potential speed optimisations to core crypto functions.
- IntersectMBO/cardano-ledger#2487 adds a new 'PoolReap' event, which can be used to obtain details of refunds for pool deposits.
- IntersectMBO/cardano-ledger#2484 reverts the incremental computation of aggregated stake distribution. Whilst this was intended to be a performance gain, it had the opposite effect.

Co-authored-by: Nicholas Clarke <nick@topos.org.uk>

Merge IntersectMBO#3189

3189: Rename testing-submit-api.md to README.md r=newhoggy a=newhoggy



Co-authored-by: John Ky <john.ky@iohk.io>

Update cardano-ledger and ouroboros-network.

This pulls in two main things:
- A fix for the time-conversion bug (IntersectMBO#3090), activated in PV6.
- Moving the TPraos protocol to its own package.

Bump version numbers and changelog.

Merge IntersectMBO#3085

3085: Expose Ledger events through the API. r=nc6 a=nc6

- Add a function 'applyBlockWithEvents' which yields events along with a
  new ledger state.

Co-authored-by: Nicholas Clarke <nick@topos.org.uk>