Update Rio to Sydney.

ISHelp/ISHelpGen/compile.bat

@@ -14,7 +14,7 @@ if exist compilesettings.bat goto compilesettingsfound
 echo ishelp\ishelpgen\compilesettings.bat is missing or incomplete. It needs to be created
 echo with the following lines, adjusted for your system:
 echo.
-echo   set DELPHIXEROOT=C:\Program Files\Embarcadero\RAD Studio\20.0 [Path to Delphi 10.3 Rio (or later)]
+echo   set DELPHIXEROOT=C:\Program Files\Embarcadero\RAD Studio\20.0 [Path to Delphi 10.4 Sydney (or later)]
 goto failed2
 
 :compilesettingsfound

Projects/Version.inc

@@ -59,6 +59,9 @@
                                                 {$DEFINE IS_D102TOKYO}  { then it must be at least Delphi 10.2 Tokyo }
                                                 {$IFNDEF VER320}  { if it's not Delphi 10.2 Tokyo }
                                                   {$DEFINE IS_D103RIO}  { then it must be at least Delphi 10.3 Rio }
+                                                  {$IFNDEF VER330}  { if it's not Delphi 10.3 Rio }
+                                                    {$DEFINE IS_D104SYDNEY}  { then it must be at least Delphi 10.4 Sydney }
+                                                  {$ENDIF}
                                                 {$ENDIF}
                                               {$ENDIF}
                                             {$ENDIF}

README.md

@@ -38,7 +38,7 @@ Getting Started
 
 2. **Install Embarcadero Delphi**
 
-   We compile all of Inno Setup's projects under Delphi 10.3.3 Rio.
+   We compile all of Inno Setup's projects under Delphi 10.4.2 Sydney.
 
    If you do not have access to this version of Delphi, you should be
    able to compile the projects on later versions, however complete

compile.bat

@@ -14,7 +14,7 @@ if exist compilesettings.bat goto compilesettingsfound
 echo compilesettings.bat is missing or incomplete. It needs to be created
 echo with the following line, adjusted for your system:
 echo.
-echo   set DELPHIXEROOT=C:\Program Files\Embarcadero\RAD Studio\20.0 [Path to Delphi 10.3 Rio (or later)]
+echo   set DELPHIXEROOT=C:\Program Files\Embarcadero\RAD Studio\20.0 [Path to Delphi 10.4 Sydney (or later)]
 goto failed2
 
 :compilesettingsfound