Fix adapter imports

Author: drew-gross

src/index.js

@@ -1,8 +1,8 @@
-import winston                   from 'winston';
-import ParseServer           from './ParseServer';
-import { GCSAdapter }        from 'parse-server-gcs-adapter';
-import { S3Adapter }         from 'parse-server-s3-adapter';
-import { FileSystemAdapter } from 'parse-server-fs-adapter';
+import winston           from 'winston';
+import ParseServer       from './ParseServer';
+import GCSAdapter        from 'parse-server-gcs-adapter';
+import S3Adapter         from 'parse-server-s3-adapter';
+import FileSystemAdapter from 'parse-server-fs-adapter';
 
 if (process.env.VERBOSE || process.env.VERBOSE_PARSE_SERVER) {
   winston.level = 'silly';