v5.0.0

Requires a rebuild of the secp256k1 library as it has moved to the secp256k1-coinlib fork.

• Adds MuSig2 support with MuSigPublicKeys and MuSigStatefulSigningSession.
• Includes adaptor signature support when using MuSig2 with SchnorrAdaptorSignature.
• Adds InputSequence abstraction for input sequences. Input sequences are now 0xfffffffe by default and enforce locktimes.
• Adds locktimeIsEnforced to Transaction to determine if the locktime is in effect.
• Adds Locktime abstractions for transactions. Transactions have .isUnlocked to determine if the transaction is available for block inclusion.
• Moves to underlying secp256k1-coinlib.
• Removed dependency to wasm_interop that had a broken js dependency.
• Fixes extraEntropy being ignored for Secp256k1Base.schnorrSign.
• Adds MinGW build support for Windows