Release 1.18.0

Author: kevinAlbs

CHANGELOG.md

@@ -1,12 +1,13 @@
 # ChangeLog
 
-## Unreleased
+## 1.18.0
 
 ### Added
 - Signed binaries for macOS and Linux are now available on the GitHub release.
     - Linux binaries including `nocrypto` in the name have no dependency on OpenSSL. Drivers using the `nocrypto` variant are expected to set crypto callbacks (e.g. call `mongocrypt_setopt_crypto_hooks`) to do operations requiring crypto to avoid an error.
     - Drivers that package libmongocrypt binaries are encouraged to migrate release scripts to use these binaries.
         - No reduction in platform support is expected. glibc dependencies were checked against existing builds on RHEL 6.2 and Ubuntu 16.04.
+- Support referencing keys by `keyAltName` in `encryptedFieldsMap`.
 
 ### Changed