Fix configuring plugin.json for the first time

Author: Ghostkeeper

CMakeLists.txt

@@ -7,6 +7,7 @@ set(X3GWRITER_VERSION_MAJOR 1 CACHE STRING "The major version number.")
 set(X3GWRITER_VERSION_MINOR 1 CACHE STRING "The minor version number.")
 set(X3GWRITER_VERSION_PATCH 10 CACHE STRING "The patch version number.")
 set(X3GWRITER_SUPPORTED_SDKS "5.0.0;6.0.0" CACHE STRING "List of supported Cura SDK versions.")
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/plugin.json.in" "${CMAKE_CURRENT_BINARY_DIR}/plugin.json")
 
 #Dependencies.
 include(ExternalProject)