fix: export getEnvConfig in index file (#22)

Author: lukashass

README.md

@@ -20,7 +20,7 @@ export default {
 To access the environment variables use the built-in getter:
 
 ```ts
-import { getEnvConfig } from '@geprog/vite-plugin-env-config/getEnvConfig';
+import { getEnvConfig } from '@geprog/vite-plugin-env-config';
 
 const backendURL = getEnvConfig('BACKEND_URL');
 ```

src/index.ts

@@ -1 +1,2 @@
 export { envConfig, EnvConfigOptions } from './envConfig';
+export { getEnvConfig } from './getEnvConfig';