Use @iarna/toml instead of toml

[jloehel]

The pyproject.toml is fine. But npms toml complains. Error Message during parsing pyproject.toml:

./node_modules/toml/lib/parser.js:3833
      throw peg$buildException(null, peg$maxFailExpected, peg$maxFailPos);
      ^
[SyntaxError: Expected "}", [ \t] or [A-Za-z0-9_\-] but "\"" found.] {
  expected: [
    { type: 'literal', value: '}', description: '"}"' },
    { type: 'class', value: '[ \\t]', description: '[ \\t]' },
    {
      type: 'class',
      value: '[A-Za-z0-9_\\-]',
      description: '[A-Za-z0-9_\\-]'
    }
  ],
  found: '"',
  offset: 113,
  line: 6,
  column: 6
}

See: BinaryMuse/toml-node#51 Does not look like that it get fixed soon.