Candidate release 1.5.0

[jgriffiths]

Version 1.5.0

Added

• psbt: add psbt_get_input_signature_type to get the type of signature required by an input.
• descriptor: Add support for Elements el-prefixed descriptor builtins as used in rust-elements.
• descriptor: Add support for parsing Elements ct descriptors with slip77(), elip150() and raw hex blinding keys.
• descriptor: Add support for generating Elements confidential addresses from ct descriptors.
• descriptor: Expose functions to perform ELIP-150 blinding key tweaking.
• crypto: Add ec_public_key_tweak to tweak standard (non-xonly) pubkeys.
• elements: Add asset_blinding_key_to_ec_public_key to compute the blinding pubkey from a blinding key.

Changed

• psbt: Speed up p2tr signing slightly.
• descriptor: Allow U type children for thresh() expressions.
• build: Further extend CI coverage for scan-build/valgrind/asan checks.

Fixed

• tx: Fix taproot cached hashing when using external sha256 implementations.
• wasm: Fixes for es6 and cjs.
• address_to_scriptpubkey: Correctly handle WALLY_NETWORK_BITCOIN_REGTEST.
• amalgamation: Support all supported standard configurations. Minor improvements to make usage easier/more robust.
• Various minor code and build fixes.