Bump version to 2.1.0 in installer and package

Updated the version number to 2.1.0 in both Installer.cs and package.json to reflect the new release.

Author: IvanMurzak

Installer/Assets/PlayerPrefsEx Installer/Installer.cs

@@ -16,7 +16,7 @@ namespace Extensions.Unity.PlayerPrefsEx.Installer
     public static partial class Installer
     {
         public const string PackageId = "extensions.unity.playerprefsex";
-        public const string Version = "1.0.0";
+        public const string Version = "2.1.0";
 
         static Installer()
         {

Unity-Package/Assets/root/package.json

@@ -5,7 +5,7 @@
     "name": "Ivan Murzak",
     "url": "https://github.com/IvanMurzak"
   },
-  "version": "2.0.2",
+  "version": "2.1.0",
   "unity": "2018.3",
   "description": "Lightweight package with optimized advanced version of PlayerPrefs. Under the hood it uses the same PlayerPrefs system, but creates flexible wrapper for default system.",
   "keywords": [