tsconfig.json

{
    "compilerOptions": {
        "target": "es2015",
        "module": "commonjs",
        "moduleResolution": "node",
        "isolatedModules": false,
        "noImplicitAny": true,
        "noUnusedLocals": true,
        "noUnusedParameters": true,
        "noImplicitThis": true,
        "strictNullChecks": true,
        "removeComments": false,
        "preserveConstEnums": true,
        "suppressImplicitAnyIndexErrors": true,
        "lib": ["es2017", "dom"],
        "outDir": "./app/lib",
        "declaration": true,
        "sourceMap": true,
        "pretty": true,
        "experimentalDecorators": true,
        "typeRoots": [
            "./typings",
            "./node_modules/@types"
        ]
    },
    "include": [
        "app/src/**/*.ts",
        "typings/*"
    ],
    "exclude": [
        "node_modules/**/*.ts"
    ]
}