Svelte Getsession Order Bug

SvelteKit appears to call getSession() before endpoints and it should be calling them after.

Repro:

1. git clone https://github.com/coryvirok/svelte-getsession-order-bug.git
2. cd svelte-getsession-order-bug && npm i
3. npm run dev
4. open "http://localhost:3000" - executes a shadow endpoint src/routes/index.js
5. open "http://localhost:3000/foo" - executes a non-shadow endpoint src/routes/foo.js

You will see the following print out in your server-side console logs:

for GET /

handle() - 1st
getSession() - 3rd
GET / - 2nd
handle() - 4th

for GET /foo

handle() - 1st
GET / - 2nd
handle() - 4th