Test that it respects the es-shim-api interface

package.json

@@ -30,7 +30,9 @@
 	},
 	"bugs": "https://github.com/mathiasbynens/String.fromCodePoint/issues",
 	"scripts": {
-		"test": "node tests/tests.js",
+		"pretest": "es-shim-api --bound",
+		"test": "npm run tests-only",
+		"tests-only": "node tests/tests.js",
 		"cover": "istanbul cover --report html --verbose --dir coverage tests/tests.js",
 		"coveralls": "istanbul cover --verbose --dir coverage tests/tests.js && cat coverage/lcov.info | coveralls; rm -rf coverage/lcov*"
 	},
@@ -39,6 +41,7 @@
 		"es-abstract": "^1.17.5"
 	},
 	"devDependencies": {
+		"@es-shims/api": "^2.1.2",
 		"coveralls": "^2.11.1",
 		"istanbul": "^0.3.0"
 	}