patch rpc-bitcoin to be compatible with bitcoin core 28.0

[remcoros]

rpc-bitcoin is not compatible with Bitcoin Core 28.0, see https://github.com/vansergen/rpc-bitcoin/pull/65

This PR is a (temporary?) solution while there is no new upstream package version available.

This uses the patch-package npm package. The postinstall script in package.json is automatically executed when npm i runs and this patches rpc-bitcoin.