tsconfig.json

{
	"compilerOptions": {
		"target": "ES2018",
		"module": "commonjs",
		// rootDir is explicit so output keeps the lib/ and test/ layout; without
		// it tsc infers the common source root and flattens everything
		"rootDir": ".",
		"outDir": "dist",
		"sourceMap": true,
		"declaration": false,
		"removeComments": false,
		"noImplicitAny": true,
		"experimentalDecorators": true,
		"isolatedModules": true,
		"skipLibCheck": true,
		"alwaysStrict": true,
		"noUnusedLocals": true,
		"lib": ["ESNext"],
		"strict": false
	},
	// test/type-fixtures has its own strict tsconfig and is compiled by the test
	// that asserts on it; building it here would emit a testless file into dist
	// and drop the strictness those assertions depend on
	"include": ["lib/", "test/"],
	"exclude": ["test/type-fixtures/"]
}