[docs] Backfill changelog from 4.0.2 onwards

CHANGELOG.md

@@ -1,16 +1,77 @@
 # Changelog
 
 ## 4.0.7 (2019-01-23)
+
+- DOCS: Document unexpected behaviour around watching a tree root. [#165], [#166]
+- DOCS: Remove v2 documentation. [`8310b2cc`]
+- TESTS: Change how tests are skipped. [`0b4c8400`]
+- DOCS: Add timetrack to Readme showcase. [#167]
+- META: Change commit message style: commits are now prefixed by a `[topic]`.
+- FIX: Make sure debounced watcher terminates. [#170]
+- FIX: \[Linux\] Remove thread wake-up on timeout (introduced in 4.0.5 by error). [#174]
+- FIX: Restore compatibility with Rust before 1.30.0. [`eab75118`] 
+- META: Enforce compatibility with Rust 1.26.1 via CI. [`50924cd6`]
+- META: Add maintenance status badge. [`ecd686ba`]
+- DOCS: Freeze v4 branch (2018-10-05) [`8310b2cc`] — and subsequently unfreeze it. (2019-01-19) [`20c40f99`], [`c00da47c`]
+
+[#165]: https://github.com/passcod/notify/issues/165
+[#166]: https://github.com/passcod/notify/issues/166
+[`8310b2cc`]: https://github.com/passcod/notify/commit/8310b2ccf68382548914df6ffeaf45248565b9fb
+[`0b4c8400`]: https://github.com/passcod/notify/commit/0b4c840091f5b3ebd3262d7109308828800dc976
+[#167]: https://github.com/passcod/notify/issues/167
+[#170]: https://github.com/passcod/notify/issues/170
+[#174]: https://github.com/passcod/notify/issues/174
+[`eab75118`]: https://github.com/passcod/notify/commit/eab75118464dc5d0d48dce31ab7a8e07d7e68d80
+[`50924cd6`]: https://github.com/passcod/notify/commit/50924cd676c8bce877634e32260ef3872f2feccb
+[`ecd686ba`]: https://github.com/passcod/notify/commit/ecd686bab604442c315c114e536bdc310a9413b1
+[`20c40f99`]: https://github.com/passcod/notify/commit/20c40f99ad042fba5abf36f65e9ee598562744d8
+[`c00da47c`]: https://github.com/passcod/notify/commit/c00da47ce63815972ef7c4bafd3b8c2c11b8b0de
+
+
 ## 4.0.6 (2018-08-30)
+
+- FIX: Add some consts to restore semver compatibility. [`6d4f1ab9`]
+
+[`6d4f1ab9`]: https://github.com/passcod/notify/commit/6d4f1ab9af76ecfc856f573a3f5584ddcfe017df
+
+
 ## 4.0.5 (2018-08-29)
+
+- DEPS: Update winapi (0.3), mio (0.6), inotify (0.6), filetime (0.2), bitflags (1.0). [#162]
+- SEMVER BREAK: The bitflags upgrade introduced a breaking change to the API.
+
+[#162]: https://github.com/passcod/notify/issues/162
+
+
 ## 4.0.4 (2018-08-06)
+
+- Derive various traits for `RecursiveMode`. [#148]
+- DOCS: Add docket to Readme showcase. [#154]
+- DOCS: [Rename OS X to macOS](https://www.wired.com/2016/06/apple-os-x-dead-long-live-macos/). [#156]
+- FIX: \[FreeBSD / Poll\] Release the lock while the thread sleeps (was causing random hangs). [#159]
+
+[#148]: https://github.com/passcod/notify/issues/148
+[#154]: https://github.com/passcod/notify/issues/154
+[#156]: https://github.com/passcod/notify/issues/156
+[#159]: https://github.com/passcod/notify/issues/159
+
+
 ## 4.0.3 (2017-11-26)
 
-## unreleased
+- FIX: \[macOS\] Concurrency-related FSEvent crash. [#132]
+- FIX: \[macOS\] Deadlock due to race in FsEventWatcher. [#118], [#134]
+- DEPS: Update walkdir to 2.0. [`fbffef24`]
+
+[#118]: https://github.com/passcod/notify/issues/118
+[#132]: https://github.com/passcod/notify/issues/132
+[#134]: https://github.com/passcod/notify/issues/134
+[`fbffef24`]: https://github.com/passcod/notify/commit/fbffef244726aae6e8a98e33ecb77a66274db91b
+
 
-- FIX: Suppress events for files which have been moved and deleted if a new file in the original location is created quickly when using the debounced interface (eg. while safe-saving files)
 ## 4.0.2 (2017-11-03)
 
+- FIX: Suppress events for files which have been moved and deleted if a new file in the original location is created quickly when using the debounced interface (eg. while safe-saving files) [#129]
+
 [#129]: https://github.com/passcod/notify/issues/129