add a log of changes

fix #113

CHANGELOG.md

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+# Charge Long
+
+## 6.0
+
+- Drop support for node 6 and 8
+- fix symlinks and hardlinks on windows being packed with `\`-style path
+  targets
+
+## 5.0
+
+- Address unpack race conditions using path reservations
+- Change large-numbers errors from TypeError to Error
+- Add `TAR_*` error codes
+- Raise `TAR_BAD_ARCHIVE` warning/error when there are no valid entries
+  found in an archive
+- do not treat ignored entries as an invalid archive
+- drop support for node v4
+- unpack: conditionally use a file mapping to write files on Windows
+- Set more portable 'mode' value in portable mode
+- Set `portable` gzip option in portable mode
+
+## 4.4
+
+- Add 'mtime' option to tar creation to force mtime
+- unpack: only reuse file fs entries if nlink = 1
+- unpack: rename before unlinking files on Windows
+- Fix encoding/decoding of base-256 numbers
+- Use `stat` instead of `lstat` when checking CWD
+- Always provide a callback to fs.close()
+
+## 4.3
+
+- Add 'transform' unpack option
+
+## 4.2
+
+- Fail when zlib fails
+
+## 4.1
+
+- Add noMtime flag for tar creation
+
+## 4.0
+
+- unpack: raise error if cwd is missing or not a dir
+- pack: don't drop dots from dotfiles when prefixing
+
+## 3.1
+
+- Support `@file.tar` as an entry argument to copy entries from one tar
+  file to another.
+- Add `noPax` option
+- `noResume` option for tar.t
+- win32: convert `>|<?:` chars to windows-friendly form
+- Exclude mtime for dirs in portable mode
+
+## 3.0
+
+- Minipass-based implementation
+- Entirely new API surface, `tar.c()`, `tar.x()` etc., much closer to
+  system tar semantics
+- Massive performance improvement
+- Require node 4.x and higher
+
+## 0.x, 1.x, 2.x - 2011-2014
+
+- fstream-based implementation
+- slow and kinda bad, but better than npm shelling out to the system `tar`