Updated version to 2.0.8 since SDL_image depends on it

CMakeLists.txt

@@ -42,9 +42,9 @@ include(${SDL2_SOURCE_DIR}/cmake/sdlchecks.cmake)
 # set SDL_BINARY_AGE and SDL_INTERFACE_AGE to 0.
 set(SDL_MAJOR_VERSION 2)
 set(SDL_MINOR_VERSION 0)
-set(SDL_MICRO_VERSION 7)
+set(SDL_MICRO_VERSION 8)
 set(SDL_INTERFACE_AGE 0)
-set(SDL_BINARY_AGE 7)
+set(SDL_BINARY_AGE 8)
 set(SDL_VERSION "${SDL_MAJOR_VERSION}.${SDL_MINOR_VERSION}.${SDL_MICRO_VERSION}")
 
 # Set defaults preventing destination file conflicts