message: Use slimmed down tsconfig.json
diff: {
  "extends": "@spotify/web-scripts/config/tsconfig.json",
  - "include": ["src"],
  - "compilerOptions": {
  - "incremental": true,
  - "isolatedModules": false,
  - "noEmit": true,
  - "declaration": false,
  - "jsx": "preserve"
  - }
  + "include": ["src"]
  }
  