tsconfig.json

{
  "compilerOptions": {
    // Target latest version of ECMAScript.
    "target": "esnext",
    "module": "commonjs",
    "sourceMap": true,
    // Search under node_modules for non-relative imports.
    "moduleResolution": "node",
    // Process & infer types from .js files.
    "allowJs": true,
    // Generates corresponding '.d.ts' file.
    "declaration": true,
    // Don't emit; allow Babel to transform files.
    "noEmit": true,
    // Enable strictest settings like strictNullChecks & noImplicitAny.
    "strict": false,
    // Disallow features that require cross-file information for emit.
    // "isolatedModules": true,
    // Import non-ES modules as default imports.
    "esModuleInterop": true,
    "jsx": "preserve",
    "jsxFactory": "slack.h"
  },
  "include": ["src", "@types"]
}