Merge pull request #56 from Rich-Harris/publint

apply publint suggestion

Author: Rich-Harris

package.json

@@ -10,21 +10,21 @@
 			"default": "./index.js"
 		}
 	},
-	"main": "index.js",
 	"files": [
 		"index.js",
 		"src",
 		"types"
 	],
 	"types": "./types/index.d.ts",
 	"devDependencies": {
+		"publint": "^0.1.7",
 		"typescript": "^3.1.3",
 		"uvu": "^0.5.6"
 	},
 	"scripts": {
 		"build": "tsc",
 		"test": "uvu test",
-		"prepublishOnly": "npm test && npm run build"
+		"prepublishOnly": "npm test && publint && npm run build"
 	},
 	"license": "MIT",
 	"type": "module",