v5.0.0

This release concludes the migration of ink! from Parity to the outside world. It doesn't come with any new features, we just:

• …changed the Parity URLs to ones for our new GitHub organization
  @use-ink.
• …upgraded many dependencies to newer versions, which results in two particular
  breaking changes regarding compatibility:
  • We had to remove support for Substrate metadata that is below
    V14 in #1722. Metadata formats below V14 are quite old and we hope this doesn't affect anyone.
  • cargo-contract v5 works only with Rust >= 1.81.

Changed

• Updated the toolchain version used by ink_linting - #1616
• Update repository URLs & references from paritytech GitHub organization to new use-ink one ‒ #1663
• Bump the version of subxt and subxt-signer - #1722

Removed

• Remove support for V11 metadata #1722