Update dependency koa to ^2.9.0

package.json

@@ -18,7 +18,7 @@
   "dependencies": {
     "@ianwalter/print": "^3.4.0",
     "@ianwalter/router": "^1.3.0",
-    "koa": "^2.8.1",
+    "koa": "^2.9.0",
     "koa-json": "^2.0.2"
   },
   "eslintConfig": {

yarn.lock

@@ -1186,6 +1186,11 @@ emoji-regex@^8.0.0:
   resolved "https://registry.yarnpkg.com/emoji-regex/-/emoji-regex-8.0.0.tgz#e818fd69ce5ccfcb404594f842963bf53164cc37"
   integrity sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==
 
+encodeurl@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.2.tgz#ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59"
+  integrity sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k=
+
 end-of-stream@^1.1.0:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.4.1.tgz#ed29634d19baba463b6ce6b80a37213eab71ec43"
@@ -2562,10 +2567,10 @@ koa-json@^2.0.2:
     koa-is-json "1"
     streaming-json-stringify "3"
 
-koa@^2.8.1:
-  version "2.8.1"
-  resolved "https://registry.yarnpkg.com/koa/-/koa-2.8.1.tgz#98e13b267ab8a1868f015a4b41b5a52e31457ce5"
-  integrity sha512-iCgjRkntcVud5amnioi+79r7TPVhKPfCY8UzL9GjyU+nIWTE9xsqyrJ6kib3InT9JYRyUu9Y67i5apCjf997TQ==
+koa@^2.9.0:
+  version "2.9.0"
+  resolved "https://registry.yarnpkg.com/koa/-/koa-2.9.0.tgz#ec957fc83cb2722fa56d26c1b2231d402d8542a2"
+  integrity sha512-Y1kb5wqcEm3FuFmPenIX3o61zbKVx+wy0p8kiG+DAv70WiTrnoupDQy8fpLYT6esaJmLdzgzmGbLCKcamw+VvA==
   dependencies:
     accepts "^1.3.5"
     cache-content-type "^1.0.0"
@@ -2576,6 +2581,7 @@ koa@^2.8.1:
     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"