update downloadTool to handle errors from response stream and retry (#369)

package-lock.json

@@ -4,11 +4,6 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
-    "@actions/core": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.1.tgz",
-      "integrity": "sha512-xD+CQd9p4lU7ZfRqmUcbJpqR+Ss51rJRVeXMyOLrZQImN9/8Sy/BEUBnHO/UKD3z03R686PVTLfEPmkropGuLw=="
-    },
     "@actions/http-client": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/@actions/http-client/-/http-client-1.0.6.tgz",