[inspector] enable inspector by default

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index bce9103f6499fbbafb869c2085d5a40e69e523df..31ae7923af449c6087bd859d49b6bfbc8628bd56 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -1867,7 +1867,7 @@ class InspectorClient : public v8_inspector::V8InspectorClient {
     v8_inspector::V8InspectorSession* session =
         InspectorClient::GetSession(context);
     int length = message->Length();
-    std::unique_ptr<uint16_t> buffer(new uint16_t[length]);
+    std::unique_ptr<uint16_t[]> buffer(new uint16_t[length]);
     message->Write(buffer.get(), 0, length);
     v8_inspector::StringView message_view(buffer.get(), length);
     session->dispatchProtocolMessage(message_view);