Added Required logic if not found, and added better update logic

compiler/src/ScriptCompiler.ts

@@ -17,7 +17,7 @@ export interface ICompilationLogger {
     writeLine(message: string): void;
 }
 
-export { CompilationError };
+export { CompilationError, CompilationErrorType };
 
 class Metrics {
     public totalLinesRead : number = 0;