refact: remove 'late' modifier from JsonCacheMem attributes

Author: rafamizes

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- removal of _late_ modifier from the attributes of the JsonCacheMem class.
+
 ## [0.3.1] - 2021-08-25
 
 ### Added

lib/src/json_cache_mem.dart

@@ -92,10 +92,10 @@ class JsonCacheMem implements JsonCache {
   final ReadWriteMutex _mutex;
 
   /// in-memory shared storage.
-  static late final Map<String, Map<String, dynamic>?> _shrMem = {};
+  static final Map<String, Map<String, dynamic>?> _shrMem = {};
 
   /// shared mutex.
-  static late final _shrMutex = ReadWriteMutex();
+  static final _shrMutex = ReadWriteMutex();
 
   /// Frees up storage space in both the level2 cache and in-memory cache.
   @override

pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.6.1"
+    version: "2.8.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -28,7 +28,7 @@ packages:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   clock:
     dependency: transitive
     description:
@@ -120,7 +120,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.7.0"
   mutex:
     dependency: "direct main"
     description:
@@ -279,7 +279,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.0"
+    version: "0.4.2"
   typed_data:
     dependency: transitive
     description: