Updated wiki example to match TypeScript 4.2.3

All examples tested with version 4.2.3. The correction I have made has also been tested with the current latest master branch source (microsoft/TypeScript@ec77bff).

Author: dragosrotaru

Using-the-Compiler-API.md

@@ -47,7 +47,7 @@ function compile(fileNames: string[], options: ts.CompilerOptions): void {
 
   allDiagnostics.forEach(diagnostic => {
     if (diagnostic.file) {
-      let { line, character } = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start!);
+      let { line, character } = ts.getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start!);
       let message = ts.flattenDiagnosticMessageText(diagnostic.messageText, "\n");
       console.log(`${diagnostic.file.fileName} (${line + 1},${character + 1}): ${message}`);
     } else {