More clang-tidy.

Author: kring

CesiumRasterOverlays/src/IonRasterOverlay.cpp

@@ -20,6 +20,7 @@
 
 #include <cstdint>
 #include <memory>
+#include <optional>
 #include <string>
 #include <unordered_map>
 #include <utility>

CesiumRasterOverlays/src/TileMapServiceRasterOverlay.cpp

@@ -23,7 +23,7 @@
 
 #include <glm/common.hpp>
 #include <nonstd/expected.hpp>
-#include <spdlog/fwd.h>
+#include <spdlog/spdlog.h>
 #include <tinyxml2.h>
 
 #include <cstddef>