Dependabot migrated to github

(cherry picked from commit c06de3a)

Author: i4004

.github/dependabot.yml

@@ -8,7 +8,3 @@ updates:
     timezone: Asia/Dacca
   open-pull-requests-limit: 10
   target-branch: develop
-  ignore:
-  - dependency-name: Simplify.Web
-    versions:
-    - 4.3.0

README.md

@@ -6,7 +6,6 @@
 [![Libraries.io dependency status for latest release](https://img.shields.io/librariesio/release/nuget/Simplify.Web.Postman)](https://libraries.io/nuget/Simplify.Web.Postman)
 [![CodeFactor Grade](https://img.shields.io/codefactor/grade/github/SimplifyNet/Simplify.Web.Postman)](https://www.codefactor.io/repository/github/simplifynet/Simplify.Web.Postman)
 ![Platform](https://img.shields.io/badge/platform-.NET%20Standard%202.0-lightgrey)
-[![Dependabot Status](https://api.dependabot.com/badges/status?host=github&repo=SimplifyNet/Simplify.Web.Postman)](https://dependabot.com)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen)](http://makeapullrequest.com)
 
 `Simplify.Web.Postman` is a package which provides Postman collection and environment generation extension for [Simplify.Web](https://github.com/SimplifyNet/Simplify.Web) web-framework controllers.