refactor: drop support for 'cross_local_storage'

Closes #140

Author: rafamizes

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Removed
+
+- support for the 'cross_local_storage' package — **BREAKING CHANGE** —
+  [125](https://github.com/dartoos-dev/json_cache/issues/125).
+
 ### Fixed
 
 - Refactor code warnings marked on pub.dev —

README.md

@@ -32,7 +32,6 @@ Rultor.com](https://www.rultor.com/b/dartoos-dev/json_cache)](https://www.rultor
   - [JsonCacheLocalStorage — LocalStorage](#jsoncachelocalstorage)
   - [JsonCacheSafeLocalStorage — SafeLocalStorage](#jsoncachesafelocalstorage)
   - [JsonCacheFlutterSecureStorage — FlutterSecureStorage](#jsoncachefluttersecurestorage)
-  - [JsonCacheCrossLocalStorage — CrossLocalStorage](#jsoncachecrosslocalstorage)
   - [JsonCacheHive — Hive](#jsoncachehive)
 - [Unit Test Tips](#unit-test-tips)
   - [Mocking](#mocking)
@@ -129,16 +128,16 @@ define it as a **map key** whose associated value is a boolean placeholder value
 set to `true`. For example:
 
 ```dart
-  /// Storing a simple text information.
-  jsonCache.refresh('info', {'an important information': true});
+  /// Storing a phrase.
+  jsonCache.refresh('info', {'This is very important information.': true});
 
   // later on…
 
   // This variable is a Map containing a single key.
   final cachedInfo = await jsonCache.value('info');
   // The key itself is the content of the stored information.
   final info = cachedInfo?.keys.first;
-  print(info); // 'an important information'
+  print(info); // 'This is very important information.'
 
 ```
 
@@ -321,18 +320,6 @@ is an implementation on top of the
   final info = cachedInfo?.keys.first; // 'a secret info'
 ```
 
-### JsonCacheCrossLocalStorage
-
-[JsonCacheLocalCrossStorage](https://pub.dev/documentation/json_cache/latest/json_cache/JsonCacheCrossLocalStorage-class.html)
-is an implementation on top of the
-[cross_local_storage](https://pub.dev/packages/cross_local_storage) package.
-
-```dart
-  …
-  final LocalStorageInterface localStorage = await LocalStorage.getInstance();
-  final JsonCache jsonCache = JsonCacheMem(JsonCacheCrossLocalStorage(localStorage));
-```
-
 ### JsonCacheHive
 
 [JsonCacheHive](https://pub.dev/documentation/json_cache/latest/json_cache/JsonCacheHive.html)

lib/json_cache.dart

@@ -2,7 +2,6 @@
 library json_cache;
 
 export 'src/json_cache.dart';
-export 'src/json_cache_cross_local_storage.dart';
 export 'src/json_cache_exception.dart';
 export 'src/json_cache_fake.dart';
 export 'src/json_cache_flutter_secure_storage.dart';