Bug/Outdated README: unclear whether signatureAlgorithm required or not

[Roman-Octavian]

Context

In README.md it is stated that signatureAlgorithm is OPTIONAL:

xml-crypto/README.md

Line 60 in 7e2d5a5

- `signatureAlgorithm` - **[optional]** one of the supported [signature algorithms](#signature-algorithms). Ex: `sign.signatureAlgorithm = "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"`

But this does not correspond to actual usage:

Reproduction

This behavior started occurring after updating to latest version xml-crypto: 5.0.0, therefore:

1. Install xml-crypto version 5.0.0
2. Try to sign XML document without specifying signatureAlgorithm
3. Get runtime error

Environment

• xml-crypto version 5.0.0
• NodeJS version 20.10.0
• NextJS version 13.5.4
• Windows 11 Pro 22H2
• Firefox 120.0.1 (64-bit)

Suggested solution

a. Update README to reflect changes from version 5.0.0

b. If signatureAlgorithm is not supposed to be required, fix requirement bug introduced in version 5.0.0

[cjbarth]

We've removed all the defaults from xml-crypto for version 5 in order to cause consumers to select their secure setup. It is the README that needs to be updated and we welcome a PR to do so.

[Roman-Octavian]

We've removed all the defaults from xml-crypto for version 5 in order to cause consumers to select their secure setup. It is the README that needs to be updated and we welcome a PR to do so.

In response to this comment I made PR #432 a while ago. Consider reviewing or closing the PR/issue if the change is unneeded after all. I think I forgot to lint it initially, but it should be OK now in that regard hopefully.