v5.0.0-alpha.2

The following changes are included in this release:

• #552 GET /eth/v1/validator/execution_payload_bids/{slot}/{builder_index} added
• #552 GET /eth/v1/validator/payload_attestation_data/{slot} added
• #552 POST /eth/v1/validator/duties/ptc/{epoch} added
• #552 POST /eth/v1/beacon/execution_payload_bids added
• #552 GET /eth/v1/beacon/execution_payload_envelopes/{block_id} added
• #552 GET /eth/v1/beacon/pool/payload_attestations added
• #552 POST /eth/v1/beacon/pool/payload_attestations added
• #552 GET /eth/v2/beacon/blocks/{block_id} updated
• #552 POST /eth/v2/beacon/blocks updated
• #552 execution_payload_available EVENT added
• #552 execution_payload_bid EVENT added
• #552 payload_attestation_message EVENT added
• #563 GET /eth/v2/validator/duties/proposer/{epoch} added
• #563 GET /eth/v1/validator/duties/proposer/{epoch} deprecated
• #568 GET /eth/v2/node/version added
• #568 GET /eth/v1/node/version deprecated
• #588 execution_payload EVENT added
• #588 execution_payload_gossip EVENT added
• #590 head_v2 EVENT added
• #590 head EVENT deprecated
• #598 fast_confirmation EVENT added
• #577 GET /eth/v1/beacon/blob_sidecars/{block_id} removed
• #577 blob_sidecar EVENT removed