Migrate json2xml and xml2json in favor of fast-xml-parser to avoid problem with newer Node.js versions

[leomeneguzzi]

Context

The libraries json2xml and xml2json are not maintained, and the xml2json doesn't work with newer Node.js versions.

expat/build/Release/node_expat.node: invalid ELF header
    at Module._extensions..node (node:internal/modules/cjs/loader:1454:18)
    at Module.load (node:internal/modules/cjs/loader:1208:32)
    at Module._load (node:internal/modules/cjs/loader:1024:12)
    at Module.require (node:internal/modules/cjs/loader:1233:19)
    at Module.patchedRequire (.../node_modules/.pnpm/[email protected]/node_modules/require-in-the-middle/index.js:256:27)
    at Hook._require.Module.require (.../node_modules/.pnpm/[email protected]/node_modules/require-in-the-middle/index.js:181:27)
    at require (node:internal/modules/helpers:179:18)
    at bindings (.../node_modules/.pnpm/[email protected]/node_modules/bindings/bindings.js:112:48)
    at Object.<anonymous> (.../node_modules/.pnpm/[email protected]/node_modules/node-expat/lib/node-expat.js:4:34)
    at Module._compile (node:internal/modules/cjs/loader:1358:14) {
  code: 'ERR_DLOPEN_FAILED'
}

Node.js v20.15.1

Changes

• I just changed the utils functions, where it imports and uses the removed dependencies, to use the fast-xml-parser.
• I also set the fast-xml-parser options to generate the same output for both cases.
• Also, I removed from the package.json the json2xml and xml2json, and added the fast-xml-parser