v0.4.1 release

Includes a small fix in our path traversal check when the extraction directory is a relative path.

v0.4 release

Overdue release with a bunch of fixes since we started maintaining this repo.

The following improvements are part of version 0.4:

• automatic detection of endianness
• handling of decompression error on corrupted filesystems (fix #21 and #19)
• execution speedup by using memory mapped files (fix #27 , see #28)
• added support for legacy signature of JFFS2 (0x1984)
• added support for LZO compression (see #13)
• move cstruct to cstruct 2.1 (fix #33 , see #34 and #35)
• a fix to protect against path traversals that would make jefferson write outside of the extraction directory
• support for Python 3.10
• proper handling of inode versioning