code: function del(path, opts) {
    if (typeof opts === 'undefined') {
      opts = {};
    }
  
    keys(path, opts).forEach(key => delete process.env[key]);
  }
docs: Deletes an env key at the path specified.
  If nested keys are present they will be deleted too.
  @public
  @param  {string} path A dot separated path.
  @param  {object} [opts] Additional options.
  @param  {boolean} [opts.caseSensitive=false] If true no case conversion is
  performed from the dot path provided to the env key search.
  Eg: 'tesT.kEy' will look for tesT_kEy environment variable instead of TEST_KEY.