Bump @actions/core from 1.5.0 to 1.6.0 (#36)

Author: dependabot[bot]

package-lock.json

@@ -23,7 +23,7 @@
   "author": "zoispag",
   "license": "MIT",
   "dependencies": {
-    "@actions/core": "^1.5.0",
+    "@actions/core": "^1.6.0",
     "@actions/github": "^4.0.0",
     "@octokit/graphql": "^4.8.0"
   },