deps: remove debug and depd (#114)

Author: fengmk2

lib/agent.js

@@ -2,8 +2,7 @@
 
 const OriginalAgent = require('http').Agent;
 const ms = require('humanize-ms');
-const debug = require('debug')('agentkeepalive');
-const deprecate = require('depd')('agentkeepalive');
+const debug = require('util').debuglog('agentkeepalive');
 const {
   INIT_SOCKET,
   CURRENT_ID,
@@ -27,6 +26,10 @@ if (majorVersion >= 11 && majorVersion <= 12) {
   defaultTimeoutListenerCount = 3;
 }
 
+function deprecate(message) {
+  console.log('[agentkeepalive:deprecated] %s', message);
+}
+
 class Agent extends OriginalAgent {
   constructor(options) {
     options = options || {};

package.json

@@ -14,7 +14,7 @@
     "contributor": "git-contributor",
     "test": "npm run lint && egg-bin test --full-trace",
     "test-local": "egg-bin test --full-trace",
-    "cov": "cross-env DEBUG=agentkeepalive egg-bin cov --full-trace",
+    "cov": "cross-env NODE_DEBUG=agentkeepalive egg-bin cov --full-trace",
     "ci": "npm run lint && npm run cov",
     "lint": "eslint lib test index.js"
   },
@@ -35,8 +35,6 @@
     "HttpsAgent"
   ],
   "dependencies": {
-    "debug": "^4.1.0",
-    "depd": "^2.0.0",
     "humanize-ms": "^1.2.1"
   },
   "devDependencies": {