add changelog

CHANGELOG.md

@@ -1,12 +1,27 @@
 # UNRELEASED
 
+**BREAKING CHANGES**
+
+-   The format for `EncryptionSettings.sharingStrategy` has changed. It must
+    now be created using the `CollectStrategy.deviceBasedStrategy(...)` or
+    `CollectStrategy.identityBasedStrategy()` functions.
+    ([#141](https://github.com/matrix-org/matrix-rust-sdk-crypto-wasm/pull/141))
+-   The `OlmMachine.decryptRoomEvent` has a new `DecryptionSettings` parameter
+    that allows specifying the required sender trust level. If the trust level
+    is not met, the decryption will fail. To replicate the old behaviour, use a
+    sender trust level of `TrustRequirement.Untrusted`.
+    ([#141](https://github.com/matrix-org/matrix-rust-sdk-crypto-wasm/pull/141))
+
 **Security Fixes**
 
 -   Fix `UserIdentity.isVerified` to take into account our own identity
     [#d8d9dae](https://github.com/matrix-org/matrix-rust-sdk/commit/d8d9dae9d77bee48a2591b9aad9bd2fa466354cc) (Moderate, [GHSA-4qg4-cvh2-crgg](https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-4qg4-cvh2-crgg)).
 
 **Other changes**
 
+-   `ShieldState` has a new `code` property that is set when the shield state is
+    not `None`.
+    ([#141](https://github.com/matrix-org/matrix-rust-sdk-crypto-wasm/pull/141))
 -   Add a new API `Device.encryptToDeviceEvent` to encrypt a to-device message using
     Olm.
     ([#101](https://github.com/matrix-org/matrix-rust-sdk-crypto-wasm/pull/101))