small compiler/lint fixes

Author: tanderson-ld

packages/common_client/test/data_sources/streaming_data_source_test.dart

@@ -60,7 +60,7 @@ class MockSseClient implements SSEClient {
           withReasons: withReasons, useReport: useReport),
       httpProperties: httpProperties,
       clientFactory: (Uri uri, HttpProperties properties, String? body,
-          SseHttpMethod? method) {
+          SseHttpMethod? method, EventSourceLogger? logger) {
         factoryCallback?.call(uri, properties, body, method);
         return client;
       });

packages/event_source_client/lib/src/state_backoff.dart

@@ -22,7 +22,7 @@ class StateBackoff {
   static Future<Function> _waitForBackoff(StateValues svo) async {
     final retryDelay = svo.backoff.getRetryDelay(svo.activeSince);
 
-    svo.logger.info('Waiting ${retryDelay} ms before retrying');
+    svo.logger.info('Waiting $retryDelay ms before retrying');
     await Future.delayed(Duration(milliseconds: retryDelay));
     return () {
       StateConnecting.run(svo);