Require standard@^8.6.0 instead of standard@*

package.json

@@ -26,7 +26,7 @@
   },
   "homepage": "https://github.com/lgeiger/node-abi#readme",
   "devDependencies": {
-    "standard": "*",
+    "standard": "^8.6.0",
     "tape": "^4.6.3"
   }
 }