Bump koa from 2.7.0 to 2.8.2 in /Server

Bumps [koa](https://github.com/koajs/koa) from 2.7.0 to 2.8.2.
- [Release notes](https://github.com/koajs/koa/releases)
- [Changelog](https://github.com/koajs/koa/blob/master/History.md)
- [Commits](https://github.com/koajs/koa/compare/2.7.0...2.8.2)

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

Server/package.json

@@ -18,7 +18,7 @@
     "eslint-config-standard": "^12.0.0",
     "glob": "^7.1.3",
     "immutable": "^4.0.0-rc.12",
-    "koa": "^2.7.0",
+    "koa": "^2.8.2",
     "koa-better-router": "^2.1.1",
     "koa-bodyparser": "^4.2.1",
     "koa-compress": "^3.0.0",

Server/yarn.lock

@@ -779,7 +779,7 @@ debug@3.1.0, debug@~3.1.0:
   dependencies:
     ms "2.0.0"
 
-debug@4, debug@^4.1.1:
+debug@4, debug@^4.0.1, debug@^4.1.1, debug@~4.1.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
   integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
@@ -800,13 +800,6 @@ debug@^3.0, debug@^3.1, debug@^3.1.0, debug@^3.2.6:
   dependencies:
     ms "^2.1.1"
 
-debug@^4.0.1, debug@~4.1.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.0.tgz#373687bffa678b38b1cd91f861b63850035ddc87"
-  integrity sha512-heNPJUJIqC+xB6ayLAMHaIrmN9HKa7aQO8MGqKpvCA+uJYVcvR6l5kgdrhRuwPFHU7P5/A1w0BjByPHwpfTDKg==
-  dependencies:
-    ms "^2.1.1"
-
 decode-uri-component@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.0.tgz#eb3913333458775cb84cd1a1fae062106bb87545"
@@ -935,6 +928,11 @@ emoji-regex@^7.0.1:
   resolved "https://registry.yarnpkg.com/emoji-regex/-/emoji-regex-7.0.3.tgz#933a04052860c85e83c122479c4748a8e4c72156"
   integrity sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA==
 
+encodeurl@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.2.tgz#ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59"
+  integrity sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k=
+
 engine.io-client@~3.3.1:
   version "3.3.1"
   resolved "https://registry.yarnpkg.com/engine.io-client/-/engine.io-client-3.3.1.tgz#afedb4a07b2ea48b7190c3136bfea98fdd4f0f03"
@@ -2053,10 +2051,10 @@ koa-static@^5.0.0:
     debug "^3.1.0"
     koa-send "^5.0.0"
 
-koa@^2.7.0:
-  version "2.7.0"
-  resolved "https://registry.yarnpkg.com/koa/-/koa-2.7.0.tgz#7e00843506942b9d82c6cc33749f657c6e5e7adf"
-  integrity sha512-7ojD05s2Q+hFudF8tDLZ1CpCdVZw8JQELWSkcfG9bdtoTDzMmkRF6BQBU7JzIzCCOY3xd3tftiy/loHBUYaY2Q==
+koa@^2.8.2:
+  version "2.8.2"
+  resolved "https://registry.yarnpkg.com/koa/-/koa-2.8.2.tgz#dfba771a69c1a98e014826804e95132c00af6615"
+  integrity sha512-q1uZOgpl3wjr5FS/tjbABJ8lA5+NeKa9eq7QyBP5xxgOBwJN4iBrMEgO3LroE51lrIw3BsO0WZZ0Yi6giSiMDw==
   dependencies:
     accepts "^1.3.5"
     cache-content-type "^1.0.0"
@@ -2067,6 +2065,7 @@ koa@^2.7.0:
     delegates "^1.0.0"
     depd "^1.1.2"
     destroy "^1.0.4"
+    encodeurl "^1.0.2"
     error-inject "^1.0.0"
     escape-html "^1.0.3"
     fresh "~0.5.2"