[meta] use npmignore to autogenerate an npmignore file

Author: ljharb

.gitignore

@@ -107,3 +107,5 @@ dist
 npm-shrinkwrap.json
 package-lock.json
 yarn.lock
+
+.npmignore

package.json

@@ -8,6 +8,7 @@
 		"./package.json": "./package.json"
 	},
 	"scripts": {
+		"prepack": "npmignore --auto --commentLines=autogenerated",
 		"test": "echo \"Error: no test specified\" && exit 1"
 	},
 	"repository": {
@@ -27,5 +28,13 @@
 	"bugs": {
 		"url": "https://github.com/inspect-js/is-array-buffer/issues"
 	},
-	"homepage": "https://github.com/inspect-js/is-array-buffer#readme"
+	"homepage": "https://github.com/inspect-js/is-array-buffer#readme",
+	"devDependencies": {
+		"npmignore": "^0.3.0",
+	},
+	"publishConfig": {
+		"ignore": [
+			".github/workflows"
+		]
+	}
 }