fix(deps): remove user dep on deno (#452)

We accidentally introduced a dependency on deno at site build time by
including a command that uses `deno` in a post-install hook.

The intent was to run it before typechecking, so including it in the
build command is fine and won't run for users.

packages/remix-edge-adapter/package.json

@@ -40,9 +40,10 @@
   ],
   "scripts": {
     "prepack": "pnpm run build",
-    "postinstall": "deno types > deno.d.ts",
-    "build": "tsup-node src/index.ts src/vite/plugin.ts --format esm,cjs --dts --target node16 --clean",
-    "build:watch": "pnpm run build --watch"
+    "build": "pnpm run build:src && pnpm run build:types",
+    "build:src": "tsup-node src/index.ts src/vite/plugin.ts --format esm,cjs --dts --target node16 --clean",
+    "build:types": "deno types > deno.d.ts",
+    "build:watch": "pnpm run build:src --watch"
   },
   "repository": {
     "type": "git",