test: use node --test

Don't install another devDependency for something that is built in now

package.json

@@ -18,7 +18,7 @@
 	"scripts": {
 		"build": "del-cli dist && tsc",
 		"prepack": "npm run build",
-		"test": "tsc --sourceMap && xo && c8 --all ava"
+		"test": "tsc --sourceMap && xo && c8 --all node --test --enable-source-maps"
 	},
 	"type": "module",
 	"engines": {
@@ -27,28 +27,28 @@
 	"dependencies": {},
 	"devDependencies": {
 		"@sindresorhus/tsconfig": "^5.0.0",
-		"@types/node": "^14.18.56",
-		"ava": "^5.0.1",
+		"@types/node": "^18.18.13",
 		"c8": "^8.0.1",
 		"del-cli": "^5.0.0",
 		"typescript": "^5.0.2",
 		"xo": "^0.56.0"
 	},
 	"files": [
 		"dist",
-		"!*.test.*"
+		"!*.test.*",
+		"!test.*"
 	],
 	"main": "./dist/index.js",
 	"types": "./dist/index.d.ts",
 	"xo": {
 		"rules": {
-			"@typescript-eslint/prefer-readonly-parameter-types": "warn",
-			"ava/no-ignored-test-files": "off"
+			"@typescript-eslint/prefer-readonly-parameter-types": "warn"
 		},
 		"overrides": [
 			{
 				"files": [
-					"**/*.test.*"
+					"**/*.test.*",
+					"**/test.*"
 				],
 				"rules": {
 					"@typescript-eslint/prefer-readonly-parameter-types": "off"

source/test.ts

@@ -0,0 +1,14 @@
+import {strictEqual, throws} from 'node:assert';
+import {test} from 'node:test';
+import {moduleName} from './index.js';
+
+await test('simple string input', () => {
+	strictEqual(moduleName('unicorns'), 'unicorns & rainbows');
+});
+
+await test('javascript users without typings get error on number', () => {
+	// @ts-expect-error moduleName expects a string not a number
+	throws(() => moduleName(123), {
+		message: 'Expected a string, got number',
+	});
+});