fix(package): update @types/superagent to version 4.1.7

Closes #28

Author: greenkeeper[bot]

package.json

@@ -37,7 +37,7 @@
   "homepage": "https://github.com/PacktDev/rustici-nodejs#readme",
   "dependencies": {
     "@types/debug": "4.1.4",
-    "@types/superagent": "4.1.3",
+    "@types/superagent": "4.1.7",
     "debug": "4.1.1",
     "superagent": "5.1.0",
     "axios": "0.19.0"