Enable POSIX bignumber mode when creating tar files

Closes gh-1612

initializr-web/src/main/java/io/spring/initializr/web/controller/ProjectGenerationController.java

@@ -145,6 +145,7 @@ public ResponseEntity<byte[]> springTgz(R request) throws IOException {
 	private TarArchiveOutputStream createTarArchiveOutputStream(OutputStream output) {
 		try {
 			TarArchiveOutputStream out = new TarArchiveOutputStream(new GzipCompressorOutputStream(output));
+			out.setBigNumberMode(TarArchiveOutputStream.BIGNUMBER_POSIX);
 			out.setLongFileMode(TarArchiveOutputStream.LONGFILE_POSIX);
 			return out;
 		}