Update CHANGELOG for 1.2.

CHANGELOG.md

@@ -2,6 +2,24 @@
 
 Entries are listed in reverse chronological order.
 
+# 1.x Series
+
+## 1.2
+
+* Add module documentation for using the bytes-oriented `x25519()` API.
+* Add implementation of `zeroize::Zeroize` for `PublicKey`.
+* Move unittests to a separate directory.
+* Add cargo feature flags `"fiat_u32_backend"` and `"fiat_u64_backend"` for
+  activating the Fiat crypto field element implementations.
+* Fix issue with removed `feature(external_doc)` on nightly compilers.
+* Pin `zeroize` to version 1.3 to support a wider range of MSRVs.
+* Add CI via Github actions.
+* Fix breakage in the serde unittests.
+* MSRV is now 1.41 for production and 1.48 for development.
+* Add an optional check to `SharedSecret` for contibutory behaviour.
+* Add implementation of `ReusableSecret` keys which are non-ephemeral, but which
+  cannot be serialised to discourage long-term use.
+
 ## 1.1.1
 
 * Fix a typo in the README.
@@ -23,6 +41,8 @@ Entries are listed in reverse chronological order.
 * Remove mention of deprecated `rand_os` crate from examples.
 * Clarify `EphemeralSecret`/`StaticSecret` distinction in documentation.
 
+# Pre-1.0.0
+
 ## 0.6.0
 
 * Updates `rand_core` version to `0.5`.