Upgrade morgan, seedrandom, socks-proxy, and tail dependencies

• CVE from GitHub:
  • https://github.com/duniter/duniter/network/alert/yarn.lock/morgan/open
  • https://github.com/expressjs/morgan/blob/master/HISTORY.md#191--2018-09-10
• out of date from https://david-dm.org/duniter/duniter:
  • seedrandom: https://www.npmjs.com/package/seedrandom#version-notes
  • https://github.com/TooTallNate/node-socks-proxy-agent/commits/master
  • tail: https://github.com/lucagrulla/node-tail/releases

package.json

@@ -88,7 +88,7 @@
     "memdown": "^3.0.0",
     "merkle": "0.5.1",
     "moment": "2.19.3",
-    "morgan": "1.8.1",
+    "morgan": "1.9.1",
     "multimeter": "0.1.1",
     "naclb": "1.3.10",
     "nat-upnp": "^1.1.1",
@@ -100,11 +100,11 @@
     "request": "2.81.0",
     "request-promise": "4.2.0",
     "scryptb": "6.0.5",
-    "seedrandom": "^2.4.3",
+    "seedrandom": "3.0.1",
     "sha1": "1.1.1",
-    "socks-proxy-agent": "^3.0.1",
+    "socks-proxy-agent": "4.0.2",
     "sqlite3": "3.1.13",
-    "tail": "^1.2.1",
+    "tail": "^2.0.2",
     "tweetnacl": "0.14.3",
     "typedoc": "^0.11.1",
     "underscore": "1.8.3",