@actions/artifact 0.5.1 release (#760)

* Bump @actions/http-client to latest for artifact package

* Remove typescript libs to fix failing imports

package.json

@@ -38,7 +38,7 @@
   },
   "dependencies": {
     "@actions/core": "^1.2.6",
-    "@actions/http-client": "^1.0.7",
+    "@actions/http-client": "^1.0.11",
     "@types/tmp": "^0.1.0",
     "tmp": "^0.1.0",
     "tmp-promise": "^2.0.2"