Make ParsedDockerComposeFile public to use it out of the project, since it's a useful class

Author: henri-tremblay

core/src/main/java/org/testcontainers/containers/ParsedDockerComposeFile.java

@@ -30,7 +30,7 @@
  */
 @Slf4j
 @EqualsAndHashCode
-class ParsedDockerComposeFile {
+public class ParsedDockerComposeFile {
 
     private final Map<String, Object> composeFileContent;