7.0.0

• Breaking Dropped support for Node.js 18 and 20. Node.js 22 or greater is now
• Breaking Dropped commonjs support. The package is now only available as an ES module.
• Breaking Errors from the WebServiceClient are now thrown as
  WebServiceError instances, which extend Error, rather than as plain
  objects. The code, error, status, and url properties are preserved,
  so existing field access continues to work, but the thrown value is now an
  Error. The original error is now preserved as the standard cause
  property (for example, the network error behind a FETCH_ERROR). The
  WebServiceError class and the WebServiceClientError type are now exported
  from the package.
• The code property on WebServiceError and the WebServiceClientError
  interface is now typed as WebServiceErrorCode
  (ClientErrorCode | (string & {})) instead of string, providing
  autocompletion for the client-generated codes while still accepting any
  code returned by the web service. The ClientErrorCode and
  WebServiceErrorCode types are exported from the package.
• The AddressNotFoundError, BadMethodCallError, InvalidDbBufferError,
  and ValueError classes now accept an optional cause and forward it to
  Error. Reader.openBuffer() now preserves the underlying parsing error as
  the cause of the InvalidDbBufferError it throws.
• Added a fetcher option to the WebServiceClient options, allowing a
  custom fetch implementation to be supplied (for example, to route requests
  through a custom dispatcher or proxy, or for testing). It defaults to the
  global fetch. The WebServiceClientOptions type is exported from the
  package.