Describe the bug
$page.query.get(...) returns null.

To Reproduce

• Repository: https://github.com/falsetru/sveltekit-test/tree/issue-1

git clone --branch issue-1 https://github.com/falsetru/sveltekit-test.git issue-1
cd issue-1
npm install
npm run build
npx sirv build/  # `npm run start` will hide the issue.

• Run above commands
• Visit http://localhost:5000/?name=abc

Expected behavior
abc printed, but got null.

Information about your SvelteKit Installation:

  System:
    OS: Linux 5.8 Ubuntu 20.10 (Groovy Gorilla)
    CPU: (4) x64 Intel(R) Core(TM) i7-7600U CPU @ 2.80GHz
    Memory: 763.02 MB / 15.39 GB
    Container: Yes
    Shell: 5.8 - /usr/bin/zsh
  Binaries:
    Node: 12.18.2 - /usr/bin/node
    npm: 7.7.6 - ~/.npm-packages/bin/npm
  Browsers:
    Chrome: 89.0.4389.114
    Firefox: 87.0
  npmPackages:
    @sveltejs/kit: next => 1.0.0-next.67 
    svelte: ^3.29.0 => 3.37.0 
    vite: ^2.1.0 => 2.1.5 

Additional context

• As a workaround, I am using new URLSearchParams(document.location.search).get('name').
• If I modify

  kit/packages/kit/src/runtime/server/page.js

  Line 398 in 4a1c04a

  query: new URLSearchParams(${s(request.query.toString())}),

  to

  query: new URLSearchParams(document.location.search),

  the issue is gone. Not sure whether it's proper way.