Merge pull request #21 from drone-plugins/renovate/npm-shelljs-vulnerability

Update dependency shelljs to ^0.8.0 [SECURITY]

Author: TP Honey

package.json

@@ -20,6 +20,6 @@
   "dependencies": {
     "drone-node": "^1.0.1",
     "nuget-runner": "^0.1.7",
-    "shelljs": "^0.5.3"
+    "shelljs": "^0.8.0"
   }
 }