specified C version and ungrouped Engine-Core in premake scripts

Editor/Build-Editor.lua

@@ -1,6 +1,7 @@
 project "Editor"
 	language "C++"
 	cppdialect "C++17"
+	cdialect "C17"
 	systemversion "latest"
 	targetname "Editor"
 	links {"Engine-Core"}

Engine-Core/Build-Core.lua

@@ -1,6 +1,7 @@
 project "Engine-Core"
 	language "C++"
 	cppdialect "C++17"
+	cdialect "C17"
 	systemversion "latest"
 	kind "StaticLib"
 	

Game/Build-Game.lua

@@ -1,6 +1,7 @@
 project "Game"
 	language "C++"
 	cppdialect "C++17"
+	cdialect "C17"
 	systemversion "latest"
 	targetname "Game"
 	links {"Engine-Core"}

premake5.lua

@@ -17,7 +17,6 @@ vs_intdir = "$(ProjectDir)intermediate-files/" .. output_dir
 intdir = "%{prj.location}/intermediate-files/" .. output_dir
 vs_bindir = "$(ProjectDir)bin/" .. output_dir 
 bindir = "%{prj.location}/bin/" .. output_dir
---local linuxlibdir = 
 corelibdir = "%{wks.location}/Engine-Core/lib"
 vs_corelibdir = "$(SolutionDir)Engine-Core/lib"
 coreinclude_dir = "%{wks.location}/Engine-Core/include"
@@ -29,9 +28,6 @@ imguidir = "%{wks.location}/Engine-Core/vendor/imgui"
 vs_include_dir = "$(ProjectDir)include"
 include_dir = "%{prj.location}/include"
 
-group "Core"
-	include "Engine-Core/Build-Core.lua"
-group ""
-
+include "Engine-Core/Build-Core.lua"
 include "Game/Build-Game.lua"
 include "Editor/Build-Editor.lua"