chore: version to 0.5.0

Scheduled Release: 24-02-2023

Notable Changes

ApiKey::new now accepts byte arrays and byte slices. https://github.com/near/near-jsonrpc-client-rs/pull/119
Authorization::bearer method for token-authenticated requests. https://github.com/near/near-jsonrpc-client-rs/pull/121
ApiKey::as_bytes returns a byte slice of the key without utf-8 validation. https://github.com/near/near-jsonrpc-client-rs/pull/119

Updated nearcore dependencies to 0.16.0, which now requires a MSRV of 1.67.1. https://github.com/near/near-jsonrpc-client-rs/pull/122
ApiKey::new no longer requres the input of a valid UUID. https://github.com/near/near-jsonrpc-client-rs/pull/119
Debug on ApiKey doesn't reveal the key anymore. https://github.com/near/near-jsonrpc-client-rs/pull/120
The auth module is no longer feature gated. https://github.com/near/near-jsonrpc-client-rs/pull/119

Removed the auth::IntoApiKey trait, any thing you can get a byte slice from is now a valid ApiKey input. https://github.com/near/near-jsonrpc-client-rs/pull/119
Replaced the ApiKey::as_str method with ApiKey::to_str, now returning a Result. https://github.com/near/near-jsonrpc-client-rs/pull/119
Replaced the InvalidApiKey error with InvalidHeaderValue re-exported from http. https://github.com/near/near-jsonrpc-client-rs/pull/119
Removed Display on ApiKey. https://github.com/near/near-jsonrpc-client-rs/pull/117