tsconfig.json

{
  "compilerOptions": {
    "allowJs": true,
    "allowSyntheticDefaultImports": true,
    "alwaysStrict": true,
    "baseUrl": "./",
    "esModuleInterop": true,
    "exactOptionalPropertyTypes": false,
    "forceConsistentCasingInFileNames": true,
    "importHelpers": true,
    // https://www.typescriptlang.org/tsconfig#isolatedModules
    "isolatedModules": true,
    "jsx": "react-jsx",
    "lib": ["dom", "dom.iterable", "esnext"],
    "module": "ESNext",
    "moduleResolution": "Node",
    "noFallthroughCasesInSwitch": true,
    "noImplicitAny": false,
    "noImplicitThis": false,
    "noStrictGenericChecks": false,
    "outDir": "./lib",
    "removeComments": true,
    "resolveJsonModule": true,
    "rootDir": "./src",
    "skipLibCheck": true,
    "sourceMap": true,
    "strict": true,
    "strictBindCallApply": true,
    "strictFunctionTypes": true,
    "strictNullChecks": false,
    "target": "ES6",
    "typeRoots": ["./node_modules/@types", "./src/contracts/declarations"],
    "useUnknownInCatchVariables": true
  },
  "include": ["src/**/*.ts"],
  "exclude": ["node_modules", "**/*.test.ts", "**/__mocks__/**/*"]
}