TS1056 - 只有访问者可用... tsc没有拿起tsconfig.json

Question

有关代码示例，请在下方滚动。第一部分包含TypeScript，第二部分包含tsconfig.json和package.json。使用tsc（v2.1.6）。

我的问题是如何检测打字稿是否正在提取我的tsconfig.json，请参阅github repo我在哪里解决问题：https://github.com/pluralsight-courses/typescript-fundamentals/tree/master/003-ClassesAndInterface

使用tsc编译命令行时 - 我收到错误src/index.ts(17,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. - 但在tsconfig中我确定它正在针对ES5或以上...我不知道出了什么问题/或者我在这里忽略的。

TypeScript index.ts

class Engine {
    constructor(public horsePower: number,
        public engineType: string) {
    }
}
class Car {
    // Fields
    private _engine: Engine;
    // Constructor(s)
    constructor(engine: Engine) {
        this.engine = engine;
    }
    // Properties
    get engine(): Engine { return this._engine; }
    set engine(value: Engine) {
        if (value == undefined) throw 'Supply an Engine!';
        this._engine = value;
    }
    // Functions
    start() { return `Started ${this.engine}.`; }
    stop() { return `Stopped ${this.engine}.`; }
}

tsconfig.json

{
    "compileOnSave": true,
    "compilerOptions": {
        "module": "commonjs",
        "noImplicitAny": true,
        "sourceMap": true,
        "outDir": "app"
    },
    "include": [
        "src/**/*.ts"
    ],
    "exclude": [
        "node_modules"
    ]
}

的package.json

{
  "name": "classesandinterfaces",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "npm run tsc && node app/index.js",
    "tsc": "tsc --project ./tsconfig.json",
    "tscver": "tsc --version"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "typescript": "2.1.6"
  }
}