Add methods to Result. Bump version to 2.0 and remove deprecated features.

CHANGELOG.md

Index: CHANGELOG.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e4a869678e19014e3aa92dcbc24333ed956d90cb..a1e968327ef6f0f40998ba4fd780365be6510806 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+## 2.0.0
+* Remove deprecated public `result.dart` and `stream_zip.dart` libraries and
+  deprecated classes `ReleaseStreamTransformer` and `CaptureStreamTransformer`.
+
+* Add `captureAll` and `flattenList` static methods to `Result`.
+
+* Change `ErrorResult` to not be generic and always be a `Result<Null>`.
+  That makes an error independent of the type of result it occurs instead of.
+
 ## 1.13.3
 
 * Make `TypeSafeStream` extend `Stream` instead of implementing it. This ensures