Upgrade: Bump agentkeepalive from 4.1.2 to 4.1.3 (#135)

Bumps [agentkeepalive](https://github.com/node-modules/agentkeepalive) from 4.1.2 to 4.1.3.
- [Release notes](https://github.com/node-modules/agentkeepalive/releases)
- [Changelog](https://github.com/node-modules/agentkeepalive/blob/master/History.md)
- [Commits](node-modules/agentkeepalive@4.1.2...4.1.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

package.json

@@ -36,7 +36,7 @@
     "@kubernetes/client-node": "^0.12.0",
     "@razee/kubernetes-util": "^0.1.3",
     "JSONStream": "^1.3.5",
-    "agentkeepalive": "^4.1.2",
+    "agentkeepalive": "^4.1.3",
     "bunyan": "^1.8.12",
     "fs-extra": "^9.0.0",
     "object-hash": "^2.0.3",