Close streams when unpacking the CLI

See gh-9080

spring-boot-cli/src/it/java/org/springframework/boot/cli/infrastructure/CommandLineInvoker.java

@@ -80,6 +80,7 @@ public final class CommandLineInvoker {
 
 			})[0];
 			ZipInputStream input = new ZipInputStream(new FileInputStream(zip));
+			try {
 				ZipEntry entry;
 				while ((entry = input.getNextEntry()) != null) {
 					File file = new File(unpacked, entry.getName());
@@ -88,11 +89,21 @@ public final class CommandLineInvoker {
 					}
 					else {
 						file.getParentFile().mkdirs();
-					StreamUtils.copy(input, new FileOutputStream(file));
+						FileOutputStream output = new FileOutputStream(file);
+						try {
+							StreamUtils.copy(input, output);
 							if (entry.getName().endsWith("/bin/spring")) {
 								file.setExecutable(true);
 							}
 						}
+						finally {
+							output.close();
+						}
+					}
+				}
+			}
+			finally {
+				input.close();
 			}
 		}
 		File bin = new File(unpacked.listFiles()[0], "bin");