[dist] Update dependency agentkeepalive to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
agentkeepalive	dependencies	major	^2.0.3 -> ^4.0.0

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Release Notes

node-modules/agentkeepalive

v4.0.2

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fixes

• [56d4a9b] - fix: HttpAgent export = internal (#​74) (Andrew Leedham <mailto:AndrewLeedham@outlook.com>)

v4.0.1

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fixes

• [bad1ac0] - fix: HttpsAgent Type Definition (#​71) (#​72) (Andrew Leedham <mailto:AndrewLeedham@outlook.com>)
• [f48a4a7] - fix: export interface (#​70) (Vinay <mailto:vinaybedre@gmail.com>)

others

• [9124343] - chore: add agent.options.keepAlive instead agent.keepAlive (fengmk2 <mailto:<fengmk2@​gmail.com>>)
• [d177d40] - test: add request timeout bigger than agent timeout cases (fengmk2 <mailto:<fengmk2@​gmail.com>>)

v4.0.0

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features

• [5c9f3bb] - feat: impl the new Agent extend http.Agent (fengmk2 <mailto:<fengmk2@​gmail.com>>)

others

• [498c8f1] - chore: move LICENSE from readme to file (fengmk2 <mailto:<fengmk2@​gmail.com>>)
• [4f39894] - bugfix: support agent.options.timeout on https agent (fengmk2 <mailto:<fengmk2@​gmail.com>>)

v3.5.2

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fixes

• [5751fc1] - fix: sockLen being miscalculated when removing sockets (#​60) (Ehden Sinai <mailto:cixel@users.noreply.github.com>)

v3.5.1

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fixes

• [495f1ab] - fix: add the lost npm files (#​66) (Henry Zhuang <mailto:zhuanghengfei@gmail.com>)

v3.5.0

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features

• [16f5aea] - feat: add typing define. (#​65) (Henry Zhuang <mailto:zhuanghengfei@gmail.com>)

others

• [28fa062] - docs: add "per host" to description of maxFreeSockets (tony-gutierrez <mailto:tony.gutierrez@bluefletch.com>)
• [7df2577] - test: run test on node 10 (#​63) (fengmk2 <mailto:<fengmk2@​gmail.com>>)

v3.4.1

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fixes

• [4d3a3b1] - fix: Handle ipv6 addresses in host-header correctly with TLS (#​53) (Mattias Holmlund <mailto:<u376@​m1.holmlund.se>>)

others

• [55a7a5c] - test: stop timer after test end (fengmk2 <mailto:<fengmk2@​gmail.com>>)

v3.4.0

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features

• [bc7cadb] - feat: use socket custom freeSocketKeepAliveTimeout first (#​59) (fengmk2 <mailto:<fengmk2@​gmail.com>>)

others

• [138eda8] - doc: fix keepAliveMsecs params description (#​55) (Hongcai Deng <mailto:admin@dhchouse.com>)

v3.3.0

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• feat: add statusChanged getter (#​51)
• chore: format License

v3.2.0

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• feat: add expiring active sockets
• test: add node 8 (#​49)

v3.1.0

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• feat: timeout support humanize ms (#​48)

v3.0.0

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• fix: emit agent socket close event
• test: add remove excess calls to removeSocket
• test: use egg-ci
• test: refactor test with eslint rules
• feat: merge _http_agent.js from 7.2.1

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[codecov-io]

Codecov Report

Merging #1358 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1358   +/-   ##
=======================================
  Coverage   92.35%   92.35%           
=======================================
  Files           6        6           
  Lines         314      314           
=======================================
  Hits          290      290           
  Misses         24       24

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