Cppcheck: add explicit to some constructors in region.h

region.h

@@ -27,7 +27,7 @@ private:
 	bg::model::polygon<boost::geometry::model::d2::point_xy<double>> contour;
 	BoundingBox bbox;
 public:
-	ContourData(BoundingBox bbox);
+	explicit ContourData(BoundingBox bbox);
 	bool within(Position p);
 	void add_point(Position p);
 };
@@ -53,6 +53,6 @@ class Country {
 private:
 	std::vector<Region*> regions;
 public:
-	Country(const std::vector<std::filesystem::path>& jsons);
+	explicit Country(const std::vector<std::filesystem::path>& jsons);
 	void locate(Cache& c);
 };