Bump http-proxy from 1.17.0 to 1.18.1 in /ipynb-viewer

Bumps [http-proxy](https://github.com/http-party/node-http-proxy) from 1.17.0 to 1.18.1. - [Release notes](https://github.com/http-party/node-http-proxy/releases) - [Changelog](https://github.com/http-party/node-http-proxy/blob/master/CHANGELOG.md) - [Commits](http-party/node-http-proxy@1.17.0...1.18.1) Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

ipynb-viewer/yarn.lock

@@ -3507,7 +3507,7 @@ debug@2.6.9, debug@^2.2.0, debug@^2.3.3, debug@^2.6.0, debug@^2.6.8, debug@^2.6.
  dependencies:
  ms "2.0.0"
 
-debug@^3.2.5, debug@^3.2.6:
+debug@^3.2.5:
  version "3.2.6"
  resolved "https://registry.yarnpkg.com/debug/-/debug-3.2.6.tgz#e83d17de16d8a7efb7717edbe5fb10135eee629b"
  integrity sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==
@@ -4258,10 +4258,10 @@ etag@~1.8.1:
  resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
  integrity sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=
 
-eventemitter3@^3.0.0:
- version "3.1.2"
- resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-3.1.2.tgz#2d3d48f9c346698fce83a85d7d664e98535df6e7"
- integrity sha512-tvtQIeLVHjDkJYnzf2dgVMxfuSGJeM/7UCG17TT4EumTfNtF+0nebF/4zWOIkCreAbtNqhGEboB6BWrwqNaw4Q==
+eventemitter3@^4.0.0:
+ version "4.0.7"
+ resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-4.0.7.tgz#2de9b68f6528d5644ef5c59526a1b4a07306169f"
+ integrity sha512-8guHBZCwKnFhYdHr2ysuRWErTwhoN2X8XELRlrRwpmfeY2jjuUN4taQMsULKUVo1K4DvZl+0pgfyoysHxvmvEw==
 
 eventlistener@0.0.1:
  version "0.0.1"
@@ -4609,11 +4609,9 @@ flush-write-stream@^1.0.0:
  readable-stream "^2.3.6"
 
 follow-redirects@^1.0.0:
- version "1.7.0"
- resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.7.0.tgz#489ebc198dc0e7f64167bd23b03c4c19b5784c76"
- integrity sha512-m/pZQy4Gj287eNy94nivy5wchN3Kp+Q5WgUPNy5lJSZ3sgkVKSYV/ZChMAQVIgx1SqfZ2zBZtPA2YlXIWxxJOQ==
- dependencies:
- debug "^3.2.6"
+ version "1.13.0"
+ resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.13.0.tgz#b42e8d93a2a7eea5ed88633676d6597bc8e384db"
+ integrity sha512-aq6gF1BEKje4a9i9+5jimNFIpq4Q1WiwBToeRK5NvZBd/TRsmW8BsJfOEGkr76TbOyPVD3OVDN910EcUNtRYEA==
 
 for-in@^0.1.3:
  version "0.1.8"
@@ -5198,11 +5196,11 @@ http-proxy-middleware@^0.19.1:
  micromatch "^3.1.10"
 
 http-proxy@^1.17.0:
- version "1.17.0"
- resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.17.0.tgz#7ad38494658f84605e2f6db4436df410f4e5be9a"
- integrity sha512-Taqn+3nNvYRfJ3bGvKfBSRwy1v6eePlm3oc/aWVxZp57DQr5Eq3xhKJi7Z4hZpS8PC3H4qI+Yly5EmFacGuA/g==
+ version "1.18.1"
+ resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.18.1.tgz#401541f0534884bbf95260334e72f88ee3976549"
+ integrity sha512-7mz/721AbnJwIVbnaSv1Cz3Am0ZLT/UBwkC92VlxhXv/k/BBQfM2fXElQNC27BVGr0uwUpplYPQM9LnaBMR5NQ==
  dependencies:
- eventemitter3 "^3.0.0"
+ eventemitter3 "^4.0.0"
  follow-redirects "^1.0.0"
  requires-port "^1.0.0"