code: function resolve(filePath, relativeTo) {
      const fullPath = path.resolve(relativeTo || '', filePath);
      return { filePath: fullPath, configFullName: fullPath };
  }
docs: Resolves a configuration file path into the fully-formed path, whether filename
  or package name.
  @param {string} filePath The filepath to resolve.
  @param {string} [relativeTo] The path to resolve relative to.
  @returns {Object} An object containing 3 properties:
  - 'filePath' (required) the resolved path that can be used directly to load the configuration.
  - 'configName' the name of the configuration inside the plugin.
  - 'configFullName' (required) the name of the configuration as used in the wist config(e.g. 'plugin:node/recommended'),
  or the absolute path to a config file. This should uniquely identify a config.
  @private