set pas2js fixes version 2.0.0RC4

compiler/packages/pastojs/src/pas2jscompiler.pp

@@ -46,7 +46,7 @@ const
   VersionMajor = 2;
   VersionMinor = 0;
   VersionRelease = 0;
-  VersionExtra = 'RC3';
+  VersionExtra = 'RC4';
   DefaultConfigFile = 'pas2js.cfg';
 
 //------------------------------------------------------------------------------