chore(deps): update dependency @std/testing to v1.0.19 (#440)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

deno.json

@@ -20,6 +20,6 @@
     "@std/assert": "jsr:@std/assert@1.0.19",
     "@std/http": "jsr:@std/http@1.1.1",
     "@std/path": "jsr:@std/path@1.1.5",
-    "@std/testing": "jsr:@std/testing@1.0.18"
+    "@std/testing": "jsr:@std/testing@1.0.19"
   }
 }