Update .editorconfig (#2207)

Author: dpvreony

.editorconfig

@@ -39,9 +39,9 @@ dotnet_style_qualification_for_method = false:suggestion
 dotnet_style_qualification_for_event = false:suggestion
 
 # only use var when it's obvious what the variable type is
-csharp_style_var_for_built_in_types = false:none
-csharp_style_var_when_type_is_apparent = false:suggestion
-csharp_style_var_elsewhere = false:suggestion
+csharp_style_var_for_built_in_types = true
+csharp_style_var_when_type_is_apparent = true
+csharp_style_var_elsewhere = true
 
 # use language keywords instead of BCL types
 dotnet_style_predefined_type_for_locals_parameters_members = true:suggestion