Update dev-dependencies

Author: wooorm

package.json

@@ -42,7 +42,7 @@
     "browserify": "^16.2.1",
     "esmangle": "^1.0.1",
     "istanbul": "^0.4.4",
-    "remark-attr": "^0.7.0",
+    "remark-attr": "^0.8.0",
     "remark": "^10.0.0",
     "remark-cli": "^6.0.0",
     "remark-comment-config": "^5.0.0",