Update agent-base to v4.3 (TooTallNate#69)

BYK · TooTallNate · commit 4a7ea9298270 · 2019-06-05T14:37:43.000-07:00
See TooTallNate/node-agent-base#25 and TooTallNate/node-agent-base#27.
diff --git a/package.json b/package.json
@@ -23,7 +23,7 @@
     "url": "https://github.com/TooTallNate/node-https-proxy-agent/issues"
   },
   "dependencies": {
-    "agent-base": "^4.2.0",
+    "agent-base": "^4.3.0",
     "debug": "^3.1.0"
   },
   "devDependencies": {
