Validation for optionals is broken.

[JarvisH]

When an optional string schema is processed, the builtInValidationMethod exits early via return.

The loop should not exit early but continue via continue.

This bug currently breaks all validation of schemas with an optional value.

function builtinValidation(env, schema) {
  const errors = [];
  for (const [key, validator] of Object.entries(schema)) {
    try {
      const res = validator(key, env[key]);
      if (typeof res === "undefined") {
        delete process.env[key];
        return; //  should be continue;
      }
      process.env[key] = res;
    } catch (err) {
      errors.push({ key, err });
    }
  }
  if (errors.length) {
    throw new Error(errorReporter$1(errors));
  }
}

[Julien-R44]

Ooops,was introduced with #9 . I didn't catch this

[Julien-R44]

Released fix with 0.2.4. Thanks for the issue !