Exclude the test files from publish

Author: zachleat

pug/package.json

@@ -13,6 +13,11 @@
     "static-site-generator"
   ],
   "exports": "./index.js",
+	"files": [
+		"*.js",
+		"!test",
+		"!test-stubs"
+	],
   "type": "module",
   "directories": {
     "test": "test"