Fixes incorrect class constraints.

Author: terrier989

cryptography/CHANGELOG.md

@@ -1,3 +1,6 @@
+## 2.6.1
+* Fixes incorrect base class constraints.
+
 ## 2.6.0
 * Improves Blake2b/Blake2s support:
   * Adds support for using as a MAC algorithm

cryptography/README.md

@@ -33,7 +33,7 @@ Android / iOS / Mac OS X operating system APIs whenever possible.
 In _pubspec.yaml_:
 ```yaml
 dependencies:
-  cryptography: ^2.5.1
+  cryptography: ^2.6.1
   cryptography_flutter: ^2.3.1 # Remove if you don't use Flutter
 ```
 

cryptography/lib/src/browser/browser_cryptography.dart

@@ -31,7 +31,7 @@ import 'hkdf.dart';
 import 'hmac.dart';
 import 'pbkdf2.dart';
 
-base class BrowserCryptography extends DartCryptography {
+class BrowserCryptography extends DartCryptography {
   // Documented in browser_cryptography_when_not_browser.dart
   static final Cryptography defaultInstance =
       isSupported ? BrowserCryptography() : DartCryptography();

cryptography/lib/src/helpers/delegating_classes.dart

@@ -79,7 +79,7 @@ abstract class DelegatingCipher implements Cipher {
 }
 
 /// Delegating base class for [Cryptography] implementations.
-abstract base class DelegatingCryptography implements Cryptography {
+abstract class DelegatingCryptography implements Cryptography {
   const DelegatingCryptography();
 
   Cryptography get fallback;

cryptography/pubspec.yaml

@@ -1,5 +1,5 @@
 name: cryptography
-version: 2.6.0
+version: 2.6.1
 homepage: https://github.com/dint-dev/cryptography
 description:
   Cryptographic algorithms for encryption, digital signatures, key agreement, authentication, and