Execution example::

  tokenize 'TokenMecab("include_form", true)' '彼の名前は山田さんのはずです。'
  # [
  #   [
  #     0,
  #     1545892987.209944,
  #     0.0004286766052246094
  #   ],
  #   [
  #     {
  #       "value": "彼",
  #       "position": 0,
  #       "force_prefix": false,
  #       "force_prefix_search": false,
  #       "metadata": {
  #         "base_form": "彼"
  #       }
  #     },
  #     {
  #       "value": "の",
  #       "position": 1,
  #       "force_prefix": false,
  #       "force_prefix_search": false,
  #       "metadata": {
  #         "base_form": "の"
  #       }
  #     },
  #     {
  #       "value": "名前",
  #       "position": 2,
  #       "force_prefix": false,
  #       "force_prefix_search": false,
  #       "metadata": {
  #         "base_form": "名前"
  #       }
  #     },
  #     {
  #       "value": "は",
  #       "position": 3,
  #       "force_prefix": false,
  #       "force_prefix_search": false,
  #       "metadata": {
  #         "base_form": "は"
  #       }
  #     },
  #     {
  #       "value": "山田",
  #       "position": 4,
  #       "force_prefix": false,
  #       "force_prefix_search": false,
  #       "metadata": {
  #         "base_form": "山田"
  #       }
  #     },
  #     {
  #       "value": "さん",
  #       "position": 5,
  #       "force_prefix": false,
  #       "force_prefix_search": false,
  #       "metadata": {
  #         "base_form": "さん"
  #       }
  #     },
  #     {
  #       "value": "の",
  #       "position": 6,
  #       "force_prefix": false,
  #       "force_prefix_search": false,
  #       "metadata": {
  #         "base_form": "の"
  #       }
  #     },
  #     {
  #       "value": "はず",
  #       "position": 7,
  #       "force_prefix": false,
  #       "force_prefix_search": false,
  #       "metadata": {
  #         "base_form": "はず"
  #       }
  #     },
  #     {
  #       "value": "です",
  #       "position": 8,
  #       "force_prefix": false,
  #       "force_prefix_search": false,
  #       "metadata": {
  #         "inflected_type": "特殊・デス",
  #         "inflected_form": "基本形",
  #         "base_form": "です"
  #       }
  #     },
  #     {
  #       "value": "。",
  #       "position": 9,
  #       "force_prefix": false,
  #       "force_prefix_search": false,
  #       "metadata": {
  #         "base_form": "。"
  #       }
  #     }
  #   ]
  # ]
