Dependabot migrated to github

Author: i4004

.github/dependabot.yml

@@ -8,8 +8,3 @@ updates:
     timezone: Asia/Dacca
   open-pull-requests-limit: 10
   target-branch: develop
-  ignore:
-  - dependency-name: Simplify.Web
-    versions:
-    - 4.3.0
-    - 4.4.0

README.md

@@ -6,7 +6,6 @@
 [![Libraries.io dependency status for latest release](https://img.shields.io/librariesio/release/nuget/Simplify.Web.Json)](https://libraries.io/nuget/Simplify.Web.Json)
 [![CodeFactor Grade](https://img.shields.io/codefactor/grade/github/SimplifyNet/Simplify.Web.Json)](https://www.codefactor.io/repository/github/simplifynet/simplify.web.Json)
 ![Platform](https://img.shields.io/badge/platform-.NET%205.0%20%7C%20.NET%20Standard%202.0%20%7C%20.NET%204.6.2%20%7C%20.NET%20Core%203.1-lightgrey)
-[![Dependabot Status](https://api.dependabot.com/badges/status?host=github&repo=SimplifyNet/Simplify.Web.Json)](https://dependabot.com)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen)](http://makeapullrequest.com)
 
 [Simplify.Web.Json](https://www.nuget.org/packages/Simplify.Web.Json/) is a package which provides JSON serialization/deserialization for [Simplify.Web](https://github.com/SimplifyNet/Simplify.Web) web-framework controllers.