Compile in C++20 mode

plugins/CMakeLists.txt

@@ -2,8 +2,8 @@ SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
 SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
 SET(CMAKE_DEBUG_POSTFIX "")
 
-# Enable C++17
-SET(CMAKE_CXX_STANDARD 17)
+# Enable C++20
+SET(CMAKE_CXX_STANDARD 20)
 
 IF(LMMS_BUILD_APPLE AND CMAKE_CXX_COMPILER_ID MATCHES "Clang")
 	SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")

plugins/VstBase/RemoteVstPlugin/CMakeLists.txt

@@ -6,7 +6,7 @@ endif()
 
 project(RemoteVstPlugin 
 	LANGUAGES CXX)
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 20)
 
 include(CheckCXXPreprocessor)
 include(CheckCXXSourceCompiles)