Go-Mirai-Client-0.1.2

• 去除application.yml
• miraigo依赖更新到最新版
• gmc_config.json 支持自定义额外header，X-Self-ID和X-Client-Role不可修改

{
    "port": "0",
    "sms": false,
    "server_groups": [
        {
            "name": "default",
            "disabled": false,
            "urls": [
                "ws://localhost:8081/ws/cq/"
            ],
            "event_filter": [],
            "regex_filter": "",
            "regex_replace": "",
            "extra_header": {
                "User-Agent": ["GMC"]
            }
        }
    ]
}