chore(deps): bump koa from 2.13.1 to 2.15.4

Bumps [koa](https://github.com/koajs/koa) from 2.13.1 to 2.15.4.
- [Release notes](https://github.com/koajs/koa/releases)
- [Changelog](https://github.com/koajs/koa/blob/2.15.4/History.md)
- [Commits](koajs/koa@2.13.1...2.15.4)

---
updated-dependencies:
- dependency-name: koa
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

yarn.lock

@@ -2753,7 +2753,7 @@ ansi-styles@^4.0.0, ansi-styles@^4.1.0:
   dependencies:
     color-convert "^2.0.1"
 
-any-promise@^1.0.0, any-promise@^1.1.0:
+any-promise@^1.0.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/any-promise/-/any-promise-1.3.0.tgz#abc6afeedcea52e809cdc0376aed3ce39635d17f"
   integrity sha1-q8av7tzqUugJzcA3au0845Y10X8=
@@ -4680,10 +4680,10 @@ [email protected]:
   resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.7.1.tgz#2f73c42142d5d5cf71310a74fc4ae61670e5dbc9"
   integrity sha512-6DnInpx7SJ2AK3+CTUE/ZM0vWTUboZCegxhC2xiIydHR9jNuTAASBrfEpHhiGOZw/nX51bHt6YQl8jsGo4y/0w==
 
-cookies@~0.8.0:
-  version "0.8.0"
-  resolved "https://registry.yarnpkg.com/cookies/-/cookies-0.8.0.tgz#1293ce4b391740a8406e3c9870e828c4b54f3f90"
-  integrity sha512-8aPsApQfebXnuI+537McwYsDtjVxGm8gTIzQI3FDW6t5t/DAhERxtnbEPN/8RX+uZthoz4eCOgloXaE5cYyNow==
+cookies@~0.9.0:
+  version "0.9.1"
+  resolved "https://registry.yarnpkg.com/cookies/-/cookies-0.9.1.tgz#3ffed6f60bb4fb5f146feeedba50acc418af67e3"
+  integrity sha512-TG2hpqe4ELx54QER/S3HQ9SRVnQnGBtKUz5bLQWtYAQ+o6GpgMs6sYUvaiJjVxb+UXwhRhAEP3m7LbsIZ77Hmw==
   dependencies:
     depd "~2.0.0"
     keygrip "~1.1.0"
@@ -5054,7 +5054,7 @@ [email protected], debug@^2.2.0, debug@^2.3.3, debug@^2.6.3, debug@^2.6.8, debug@^2.6.
   dependencies:
     ms "2.0.0"
 
-[email protected], debug@=3.1.0, debug@~3.1.0:
+[email protected], debug@=3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
   integrity sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==
@@ -9650,13 +9650,6 @@ koa-bodyparser@^4.2.0:
     co-body "^6.0.0"
     copy-to "^2.0.1"
 
-koa-compose@^3.0.0:
-  version "3.2.1"
-  resolved "https://registry.yarnpkg.com/koa-compose/-/koa-compose-3.2.1.tgz#a85ccb40b7d986d8e5a345b3a1ace8eabcf54de7"
-  integrity sha1-qFzLQLfZhtjlo0Wzoazo6rz1Tec=
-  dependencies:
-    any-promise "^1.1.0"
-
 koa-compose@^4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/koa-compose/-/koa-compose-4.1.0.tgz#507306b9371901db41121c812e923d0d67d3e877"
@@ -9677,13 +9670,13 @@ koa-conditional-get@^2.0.0:
   resolved "https://registry.yarnpkg.com/koa-conditional-get/-/koa-conditional-get-2.0.0.tgz#a43f3723c1d014b730a34ece8adf30b93c8233f2"
   integrity sha1-pD83I8HQFLcwo07Oit8wuTyCM/I=
 
-koa-convert@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/koa-convert/-/koa-convert-1.2.0.tgz#da40875df49de0539098d1700b50820cebcd21d0"
-  integrity sha1-2kCHXfSd4FOQmNFwC1CCDOvNIdA=
+koa-convert@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/koa-convert/-/koa-convert-2.0.0.tgz#86a0c44d81d40551bae22fee6709904573eea4f5"
+  integrity sha512-asOvN6bFlSnxewce2e/DK3p4tltyfC4VM7ZwuTuepI7dEQVcvpyFuBcEARu1+Hxg8DIwytce2n7jrZtRlPrARA==
   dependencies:
     co "^4.6.0"
-    koa-compose "^3.0.0"
+    koa-compose "^4.1.0"
 
 koa-etag@^3.0.0:
   version "3.0.0"
@@ -9764,16 +9757,16 @@ koa-static@^4.0.2:
     koa-send "^4.1.3"
 
 koa@^2.6.2:
-  version "2.13.1"
-  resolved "https://registry.yarnpkg.com/koa/-/koa-2.13.1.tgz#6275172875b27bcfe1d454356a5b6b9f5a9b1051"
-  integrity sha512-Lb2Dloc72auj5vK4X4qqL7B5jyDPQaZucc9sR/71byg7ryoD1NCaCm63CShk9ID9quQvDEi1bGR/iGjCG7As3w==
+  version "2.15.4"
+  resolved "https://registry.yarnpkg.com/koa/-/koa-2.15.4.tgz#7000b3d8354558671adb1ba1b1c09bedb5f8da75"
+  integrity sha512-7fNBIdrU2PEgLljXoPWoyY4r1e+ToWCmzS/wwMPbUNs7X+5MMET1ObhJBlUkF5uZG9B6QhM2zS1TsH6adegkiQ==
   dependencies:
     accepts "^1.3.5"
     cache-content-type "^1.0.0"
     content-disposition "~0.5.2"
     content-type "^1.0.4"
-    cookies "~0.8.0"
-    debug "~3.1.0"
+    cookies "~0.9.0"
+    debug "^4.3.2"
     delegates "^1.0.0"
     depd "^2.0.0"
     destroy "^1.0.4"
@@ -9784,7 +9777,7 @@ koa@^2.6.2:
     http-errors "^1.6.3"
     is-generator-function "^1.0.7"
     koa-compose "^4.1.0"
-    koa-convert "^1.2.0"
+    koa-convert "^2.0.0"
     on-finished "^2.3.0"
     only "~0.0.2"
     parseurl "^1.3.2"