update 'done()'.

I faced below test failed.
Therefore I updated 'done()' calling.

>  1) ssr
>       spread-element:
>     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/Users/runner/work/svelte/svelte/test/test.ts)

test/server-side-rendering/index.ts

@@ -53,6 +53,9 @@ describe('ssr', () => {
 		}
 
 		(solo ? it.only : it)(dir, (done) => {
+
+			try {
+
 				dir = path.resolve(`${__dirname}/samples`, dir);
 
 				cleanRequireCache();
@@ -66,7 +69,6 @@ describe('ssr', () => {
 
 				require('../../register')(compileOptions);
 
-			try {
 				const Component = require(`${dir}/main.svelte`).default;
 
 				const expectedHtml = tryToReadFile(`${dir}/_expected.html`);
@@ -131,8 +133,8 @@ describe('ssr', () => {
 				err.stack += `\n\ncmd-click: ${path.relative(process.cwd(), dir)}/main.svelte`;
 				throw err;
 			} finally {
-				done();
 				set_current_component(null);
+				done();
 			}
 		});
 	});