2 - Avoid using done_testing so this works on older systems
5 - Die if open fails in @INC handler, reduces confusing errors (DGL)
6 - RT #63466: Add ending newline if input lacks one (GUGOD)
7 - RT #60622: Fix conditional loading, only fatpack loaded modules (DGL)
10 - fixed dependency for File::Path(remove_tree/make_path was first appeared at 2.07)
13 - fixed typo and doc bug on command usage.(miyagawa)
14 - added `help' command for slightly better user experience(miyagawa)