tsconfig.json

{
  "compilerOptions": {
    "baseUrl": ".",
    "outDir": "build/dist",
    "module": "esnext",
    "target": "es2017",
    "lib": ["es6", "dom", "es2015", "esnext"],
    "sourceMap": true,
    "allowJs": true,
    "jsx": "react",
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "moduleResolution": "node",
    "forceConsistentCasingInFileNames": true,
    "noImplicitReturns": true,
    "noImplicitThis": false,
    "noImplicitAny": false,
    // "strictNullChecks": true,
    "suppressImplicitAnyIndexErrors": true,
    "noUnusedLocals": false,
    "skipLibCheck": true,
    "declaration": true,
    "types": ["react", "react-dom", "node", "jest"]
  },
  "include": [
    "packages/**/src"
  ],
  "exclude": [
    "node_modules",
    "packages/**/src/**/*.test.tsx",
    "packages/**/src/**/*.spec.tsx",
    "packages/**/src/**/*.test.ts",
    "packages/**/src/**/*.spec.ts",
    "packages/**/build",
    "packages/**/built",
    "packages/**/scripts",
    "packages/**/node_modules",
    "packages/**/public"
  ]
}