mb里如果渲染进程和主进程同时使用一个dll，会导致错误。解决方案如下。

if ("renderer" == process.type) {
        const remote = require('electron').remote;
        this._keymapping = remote.require('./../node_modules.asar.unpacked/native-keymap/build/Release/keymapping');
    } else {
        this._keymapping = require('./build/Release/keymapping');
    }