tsconfig.json

{
  "compilerOptions": {
    "target": "ES2016",
    "lib": [
      "ES5",
      "ES6",
      "DOM"
    ],
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "module": "CommonJS",
    "rootDir": "./src",
    "moduleResolution": "Node",
    "outDir": "./build",
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "skipLibCheck": true,
    "strict": true,
    "allowJs": true,
    "baseUrl": "./src",
    "allowUnreachableCode": false,
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": true,
    "resolveJsonModule": true,
    "noImplicitThis": true,
    "sourceMap": true,
    "strictNullChecks": true
  },
  "include": ["src/**/*.ts"],
  "exclude": [".yarn"]
}