tsconfig.json

{
    "compilerOptions": {
        "target": "es2018",
        "lib": ["dom", "dom.iterable", "esnext"],
        "baseUrl": ".",
        "paths": {
            "two.js": ["src/two-override"]
        },
        "allowJs": true,
        "skipLibCheck": true,
        "esModuleInterop": true,
        "allowSyntheticDefaultImports": true,
        "strict": true,
        "forceConsistentCasingInFileNames": true,
        "module": "esnext",
        "moduleResolution": "node",
        "resolveJsonModule": true,
        "isolatedModules": true,
        "noEmit": true,
        "jsx": "react-jsx",
        "downlevelIteration": true,
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "noFallthroughCasesInSwitch": true
    },
    "include": ["src", "test"]
}