Use Rollup for bundling dependencies

.gitignore

@@ -1,2 +1,3 @@
 node_modules
+build
 yarn.lock

package.json

@@ -13,16 +13,19 @@
 	"type": "module",
 	"exports": {
 		"types": "./index.d.ts",
-		"default": "./source/index.js"
+		"default": "./build/index.js"
 	},
+	"sideEffects": false,
 	"engines": {
 		"node": ">=16.10"
 	},
 	"scripts": {
+		"prepare": "npm run build",
+		"build": "rollup -c",
 		"test": "xo && ava && tsd"
 	},
 	"files": [
-		"source",
+		"build",
 		"index.d.ts"
 	],
 	"keywords": [
@@ -44,34 +47,55 @@
 		"cmd",
 		"console"
 	],
-	"dependencies": {
+	"_actualDependencies": [
+		"@types/minimist",
+		"camelcase-keys",
+		"decamelize",
+		"decamelize-keys",
+		"hard-rejection",
+		"minimist-options",
+		"normalize-package-data",
+		"read-pkg-up",
+		"redent",
+		"trim-newlines",
+		"type-fest",
+		"yargs-parser"
+	],
+	"devDependencies": {
+		"@rollup/plugin-commonjs": "^25.0.3",
+		"@rollup/plugin-json": "^6.0.0",
+		"@rollup/plugin-node-resolve": "^15.1.0",
 		"@types/minimist": "^1.2.2",
+		"ava": "^5.3.1",
 		"camelcase-keys": "^8.0.2",
+		"common-tags": "^1.8.2",
 		"decamelize": "^6.0.0",
 		"decamelize-keys": "^2.0.1",
+		"execa": "^7.2.0",
 		"hard-rejection": "^2.1.0",
+		"indent-string": "^5.0.0",
 		"minimist-options": "4.1.0",
 		"normalize-package-data": "^5.0.0",
+		"read-pkg": "^8.0.0",
 		"read-pkg-up": "^9.1.0",
 		"redent": "^4.0.0",
+		"rollup": "^3.27.0",
+		"rollup-plugin-license": "^3.0.1",
+		"strip-comments": "^2.0.1",
 		"trim-newlines": "^5.0.0",
+		"tsd": "^0.28.1",
 		"type-fest": "^3.9.0",
+		"xo": "^0.55.0",
 		"yargs-parser": "^21.1.1"
 	},
-	"devDependencies": {
-		"ava": "^5.2.0",
-		"common-tags": "^1.8.2",
-		"execa": "^7.1.1",
-		"indent-string": "^5.0.0",
-		"read-pkg": "^8.0.0",
-		"tsd": "^0.28.1",
-		"xo": "^0.54.2"
-	},
 	"xo": {
 		"rules": {
 			"unicorn/no-process-exit": "off",
 			"unicorn/error-message": "off"
-		}
+		},
+		"ignores": [
+			"build"
+		]
 	},
 	"ava": {
 		"files": [

rollup.config.js

@@ -0,0 +1,50 @@
+import json from '@rollup/plugin-json';
+import commonjs from '@rollup/plugin-commonjs';
+import {nodeResolve} from '@rollup/plugin-node-resolve';
+import license from 'rollup-plugin-license';
+import strip from 'strip-comments';
+import {defineConfig} from 'rollup';
+
+const outDir = 'build';
+
+export default defineConfig({
+	input: [
+		'source/index.js',
+		'source/options.js',
+		'source/parser.js',
+		'source/utils.js',
+		'source/validate.js',
+	],
+	output: {
+		dir: outDir,
+		interop: 'esModule',
+		generatedCode: {
+			preset: 'es2015',
+		},
+		chunkFileNames: '[name].js',
+		manualChunks(id) {
+			if (id.includes('node_modules')) {
+				return 'dependencies';
+			}
+		},
+		plugins: [{
+			name: 'strip-dependency-comments',
+			renderChunk(code, chunk) {
+				return chunk.name === 'dependencies' ? strip(code) : null;
+			},
+		}],
+	},
+	preserveEntrySignatures: 'allow-extension',
+	plugins: [
+		nodeResolve(),
+		commonjs({
+			include: 'node_modules/**',
+		}),
+		json(),
+		license({
+			thirdParty: {
+				output: `${outDir}/licenses.md`,
+			},
+		}),
+	],
+});