Update Deno Standard Library version from `v0.50.0` to `0.87.0` (#6375)

* Update standard library version from `v0.50.0` to `0.87.0`

* Update standard library version from `v0.50.0` to `0.87.0`

frameworks/TypeScript/deno/src/handlers.ts

@@ -1,7 +1,7 @@
 import {
   ServerRequest,
   Response
-} from "https://deno.land/std@v0.50.0/http/server.ts";
+} from "https://deno.land/std@0.87.0/http/server.ts";
 
 interface Handler {
   (request: ServerRequest): Promise<void>

frameworks/TypeScript/deno/src/main.ts

@@ -1,4 +1,4 @@
-import { serve } from "https://deno.land/std@v0.50.0/http/server.ts";
+import { serve } from "https://deno.land/std@0.87.0/http/server.ts";
 
 import { handlers } from "./handlers.ts";