Update Ghoul version

apps/OpenSpace/main.cpp

@@ -1078,7 +1078,7 @@ int main(int argc, char* argv[]) {
 
     bool showHelp = parser.execute();
     if (showHelp) {
-        parser.displayHelp(std::cout);
+        std::cout << parser.helpText();
         exit(EXIT_SUCCESS);
     }
     // Take an actual copy of the arguments

src/rendering/renderengine.cpp

@@ -48,6 +48,7 @@
 #include <openspace/util/updatestructures.h>
 #include <openspace/util/versionchecker.h>
 #include <ghoul/filesystem/filesystem.h>
+#include <ghoul/font/font.h>
 #include <ghoul/font/fontmanager.h>
 #include <ghoul/font/fontrenderer.h>
 #include <ghoul/io/texture/texturereader.h>