Upgrade slf4d and fix integration test.

dub.selections.json

@@ -4,7 +4,7 @@
 		"handy-http-primitives": "1.6.0",
 		"photon": "0.11.0",
 		"sharded-map": "2.7.0",
-		"slf4d": "4.0.1",
+		"slf4d": "4.1.1",
 		"streams": "3.6.0"
 	}
 }

integration-tests/http1-test.d

@@ -18,7 +18,10 @@ import requests;
 import core.thread;
 
 int main() {
-    auto loggingProvider = new shared DefaultProvider(true, Levels.INFO);
+    auto loggingProvider = DefaultProvider.builder()
+        .withRootLoggingLevel(Levels.INFO)
+        .withConsoleSerializer(true, 48)
+        .build();
     configureLoggingProvider(loggingProvider);
 
     HttpTransport transport = new Http1Transport(HttpRequestHandler.of((ref ServerHttpRequest request, ref ServerHttpResponse response) {