Update to sol2 v2.20.6

include/extractor/extraction_turn.hpp

@@ -33,16 +33,16 @@ struct ExtractionTurnLeg
     {
     }
 
-    const bool is_restricted;
-    const bool is_motorway;
-    const bool is_link;
-    const int number_of_lanes;
-    const int highway_turn_classification;
-    const int access_turn_classification;
-    const int speed;
-    const RoadPriorityClass::Enum priority_class;
-    const bool is_incoming;
-    const bool is_outgoing;
+    bool is_restricted;
+    bool is_motorway;
+    bool is_link;
+    int number_of_lanes;
+    int highway_turn_classification;
+    int access_turn_classification;
+    int speed;
+    RoadPriorityClass::Enum priority_class;
+    bool is_incoming;
+    bool is_outgoing;
 };
 
 struct ExtractionTurn

include/extractor/scripting_environment_lua.hpp

@@ -12,7 +12,7 @@
 #include <mutex>
 #include <string>
 
-#include <sol2/sol.hpp>
+#include <sol.hpp>
 
 namespace osrm
 {