tsconfig.json

{
    "compilerOptions": {
        "baseUrl": ".",
        "target": "es2017",
        "module": "commonjs",
        "sourceMap": true,
        "outDir": "output",
        "rootDir": "source",
        "typeRoots": [
          "node_modules/@types",
          "typings"
        ],
        "paths": {
            "*": [
                "./typings/*"
            ]
        },
        "watch": false,
        "emitDecoratorMetadata": true,
        "experimentalDecorators": true,
        "alwaysStrict": true,
        "allowJs": false,
        "allowSyntheticDefaultImports": false,
        "allowUnreachableCode": false,
        "allowUnusedLabels": false,
        "forceConsistentCasingInFileNames": true,
        "declaration": true,
        "noImplicitAny": true,
        "noFallthroughCasesInSwitch": true,
        "noImplicitReturns": true,
        "noImplicitThis": true,
        "noUnusedLocals": true,
        "noUnusedParameters": true,
        "strict": true,
        "strictFunctionTypes": true,
        "strictNullChecks": true
    }
}