deps: bump request to 2.8.7, fixes heok/hawk issues

PR-URL: #1492
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Matheus Marchini <matheus@sthima.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Rod Vagg <rod@vagg.org>

package.json

@@ -29,7 +29,7 @@
     "nopt": "2 || 3",
     "npmlog": "0 || 1 || 2 || 3 || 4",
     "osenv": "0",
-    "request": ">=2.9.0 <2.82.0",
+    "request": "^2.87.0",
     "rimraf": "2",
     "semver": "~5.3.0",
     "tar": "^2.0.0",