Bump koa-csrf from 3.0.7 to 3.0.8

Bumps [koa-csrf](https://github.com/koajs/csrf) from 3.0.7 to 3.0.8.
- [Release notes](https://github.com/koajs/csrf/releases)
- [Commits](https://github.com/koajs/csrf/compare/v3.0.7...v3.0.8)

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

package.json

@@ -57,7 +57,7 @@
     "koa": "^2.7.0",
     "koa-bodyparser": "^4.2.1",
     "koa-compress": "~3.0.0",
-    "koa-csrf": "^3.0.7",
+    "koa-csrf": "^3.0.8",
     "koa-error": "^3.2.0",
     "koa-favicon": "~2.0.1",
     "koa-generic-session": "^2.0.1",