Update Rust crate elements to 0.27.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
elements	dependencies	minor	0.26.0 → 0.27.0

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Release Notes

ElementsProject/rust-elements (elements)

v0.27.0

Compare Source

This release updates several dependencies. It attempts to minimize API breakage beyond updating
the dependencies. It should be considered a "transitional release" as we modernize the crate's API
over the next several releases. In particular, this release introduces a new encoding paradigm but
does not remove the old one, so depending on this may help users transition.

Dependency updates:

• Bump MRSV to 1.74.0
  #​269
  #​265

• Update bitcoin_hashes dependency to newly-stable 1.0; improve array/slice APIs

• Replace custom hex parsing with newly-stable hex-conservative 1.0
  #​261
  #​272

• Introduce newly-stable bitcoin-consensus-encoding 1.0 crate and implement its Encode and
  Decode traits on Transaction and subtypes.
  #​288

• Remove TxOut::MAX_MONEY whose use is likely incorrect on a multi-asset chain
  #​261

• pset: fix pegin/issuance flag handling in extract_tx
  #​278
  #​279
  #​282

• Implement calculation of AssetId and genesis blocks
  #​276

• Improve type safety for objects related to confidential transactions and asset issuance
  #​286
  #​289

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