Merge pull request #141 from github/actions_io

Remove direct dependency on @actions/io

Author: robertbrignull

lib/codeql.js

@@ -22,7 +22,6 @@
     "@actions/exec": "^1.0.1",
     "@actions/github": "^2.2.0",
     "@actions/http-client": "^1.0.8",
-    "@actions/io": "^1.0.1",
     "@actions/tool-cache": "^1.5.5",
     "console-log-level": "^1.4.1",
     "file-url": "^3.0.0",