tsconfig.json

{
    "compileOnSave": true,
    "compilerOptions": {
        "module": "ES2015",
        "moduleResolution": "node",
        "lib": [
            "dom",
            "es5",
            "es2015"
        ],
        // "strict": true,
        "allowSyntheticDefaultImports": true,
        "experimentalDecorators": true,
        "noImplicitAny": true,
        "noImplicitReturns": true,
        "noImplicitThis": true,
        "strictNullChecks": true,
        "esModuleInterop": true,
        "target": "es5",
        "sourceMap": true,
        "declaration": true,
        "declarationDir": "./dist",
        "removeComments": false,
        "skipLibCheck": true,
        "types" : [
            "jest",
            "vuex"
        ]
    },
    "include": [
        "src",
        "tests",
        "examples"
    ],
    "exclude": [
        "node_modules"
    ]
}