Update changelog and migrating

CHANGELOG.md

@@ -1,6 +1,12 @@
 # CHANGELOG
-### xx.x.x - YYYY-MM-DD
-[FIXED] [4646](https://github.com/stripe/stripe-android/pull/4646) Update 3ds2 to latest version 6.1.4, see PR for specific issues addressed. 
+## xx.x.x - YYYY-MM-DD
+This release enables a new configuration object to be defined for StripeCardScan.
+
+### PaymentSheet
+* [FIXED] [4646](https://github.com/stripe/stripe-android/pull/4646) Update 3ds2 to latest version 6.1.4, see PR for specific issues addressed.
+
+### CardScan
+* [ADDED] [4689](https://github.com/stripe/stripe-android/pull/4689) The `CardImageVerificationSheet` initializer can now take an additional `Configuration` object.
 
 ## 19.2.2 - 2022-03-01
 [FIXED] [4606](https://github.com/stripe/stripe-android/pull/4606) Keep status bar color in PaymentLauncher

MIGRATING.md

@@ -1,4 +1,8 @@
 # Migration Guide
+## Migrating from versions < 19.3.0
+- Changes to `StripeCardScan.Configuration`
+    - Setting custom scan values in `Config` is no longer supported. Configuration values have been moved to the `StripeCardScan.Configuration` object. If a value was removed that you need access to, please file an issue against this repository.
+
 ## Migrating from versions < 19.0.0
 - The following list of classes' package names are changed from `com.stripe.android` to `com.stripe.android.core`
     - `StripeModel`