xlsx/types/tsconfig.json

{
    "compilerOptions": {
        "module": "commonjs",
        "lib": [ "es5" ],
        "noImplicitAny": true,
        "noImplicitThis": true,
        "strictNullChecks": false,
        "baseUrl": ".",
        "paths": { "xlsx": ["."] },
        "types": [],
        "noEmit": true,
        "strictFunctionTypes": true,
        "forceConsistentCasingInFileNames": true
    }
}