Rename CollectorRequest->Collector and add extras to target

test/vlogs_test.dart

@@ -1,22 +1,21 @@
 // ignore_for_file: non_constant_identifier_names
 
 import 'package:test/test.dart';
-import 'package:vlogs/src/model.dart';
 import 'package:vlogs/vlogs.dart';
 
 void main() {
   final APP_ID = "72bd14c306a91fa8a590330e3898ddcc";
   final API_KEY = "vlogs_gX9WwSdKatMNdpUClLU0IfCx575tvdoeQ";
 
-  group('A group of tests', () {
+  group('Run collecting the logs', () {
     final sdk = VLogs.create(APP_ID, API_KEY);
 
     setUp(() {
-      // Additional setup goes here.
+      expect(sdk, isNotNull);
     });
 
     test('Emit the logs to collector', () async {
-      var request = CollectorRequest.builder()
+      var request = Collector.builder()
           .message("Hello World")
           .source(CollectorSource.mobile.name)
           .type(CollectorType.log.name)