Change vite-plugin to be a named export (#96)

Author: mattcompiles

.changeset/spicy-deers-agree.md

@@ -0,0 +1,17 @@
+---
+'@vanilla-extract/vite-plugin': patch
+---
+
+Change vite-plugin to be a named export
+
+BREAKING CHANGE
+
+```diff
+-import vanillaExtractPlugin from '@vanilla-extract/vite-plugin';
++import { vanillaExtractPlugin } from '@vanilla-extract/vite-plugin';
+
+// vite.config.js
+export default {
+  plugins: [vanillaExtractPlugin()]
+}
+```

packages/vite-plugin/src/index.ts

@@ -8,7 +8,7 @@ import {
   hash,
 } from '@vanilla-extract/integration';
 
-export default function vanillaExtractPlugin(): Plugin {
+export function vanillaExtractPlugin(): Plugin {
   let config: ResolvedConfig;
   const cssMap = new Map<string, string>();
 

test-helpers/src/startFixture/vite.ts

@@ -3,7 +3,7 @@ import http from 'http';
 
 import { createServer, build, InlineConfig } from 'vite';
 import handler from 'serve-handler';
-import vanillaExtractPlugin from '@vanilla-extract/vite-plugin';
+import { vanillaExtractPlugin } from '@vanilla-extract/vite-plugin';
 
 import { TestServer } from './types';