Update changelog [skip ci]

Author: mratsim

Diff for: changelog.md

@@ -1,11 +1,17 @@
 # Changelog
 
 
-### v0.2.0
+### v0.2.0 - December 2019
+
+Weave `EventNotifier` has been rewritten and formally verified.
+Combined with using raw Linux futex to workaround a condition variable bug
+in glibc and musl, Weave backoff system is now deadlock-free.
 
 Backoff has been renamed from `WV_EnableBackoff` to `WV_Backoff`.
 It is now enabled by default.
 
-### v0.1.0
+Weave now supports Windows.
+
+### v0.1.0 - December 2019
 
 Initial release