New shields (#129)

Author: Happypig375

ReadMe.md

@@ -9,8 +9,11 @@ CSharpMath is a C# port of the wonderful <a href="https://github.com/kostub/iosM
 [Current release][NuGet]|[![NuGet release shield](https://img.shields.io/nuget/v/CSharpMath.svg)][NuGet] [![GitHub release shield](https://img.shields.io/github/release/verybadcat/CSharpMath.svg)][GitHub] [![GitHub release date shield](https://img.shields.io/github/release-date/verybadcat/CSharpMath.svg)][GitHub] [![GitHub commits since last release shield](https://img.shields.io/github/commits-since/verybadcat/CSharpMath/latest.svg)][GitHub]
 -|-
 [Current prerelease][NuGet-pre]|[![NuGet pre-release shield](https://img.shields.io/nuget/vpre/CSharpMath.svg)][NuGet-pre] [![GitHub pre-release shield](https://img.shields.io/github/release-pre/verybadcat/CSharpMath.svg)][GitHub-pre] [![GitHub pre-release date shield](https://img.shields.io/github/release-date-pre/verybadcat/CSharpMath.svg)][GitHub-pre] [![GitHub commits since last prerelease shield](https://img.shields.io/github/commits-since/verybadcat/CSharpMath/latest.svg?include_prereleases)][GitHub-pre]
+<!-- The "Current nightly" badge is blocked on https://github.com/badges/shields/pull/4184 -->
 
-[![NuGet downloads shield](https://img.shields.io/nuget/dt/CSharpMath.svg)][NuGet] [![GitHub contributors shield](https://img.shields.io/github/contributors/verybadcat/CSharpMath.svg)](https://github.com/verybadcat/CSharpMath/graphs/contributors) [![Average time to resolve an issue](http://isitmaintained.com/badge/resolution/verybadcat/CSharpMath.svg)](http://isitmaintained.com/project/verybadcat/CSharpMath "Average time to resolve an issue") [![Percentage of issues still open](http://isitmaintained.com/badge/open/verybadcat/CSharpMath.svg)](http://isitmaintained.com/project/verybadcat/CSharpMath "Percentage of issues still open") [![❤](https://img.shields.io/badge/made%20with-%e2%9d%a4-ff69b4.svg)](https://www.youtube.com/watch?v=dQw4w9WgXcQ "")
+[![NuGet downloads shield](https://img.shields.io/nuget/dt/CSharpMath.svg)][NuGet] [![GitHub contributors shield](https://img.shields.io/github/contributors/verybadcat/CSharpMath.svg)](https://github.com/verybadcat/CSharpMath/graphs/contributors) [![GitHub license shield](https://img.shields.io/github/license/verybadcat/CSharpMath.svg)](https://github.com/verybadcat/CSharpMath/blob/master/License) [![GitHub last commit shield](https://img.shields.io/github/last-commit/verybadcat/CSharpMath.svg)](https://github.com/verybadcat/CSharpMath/commits/master) [![GitHub Build workflow shield](https://img.shields.io/github/workflow/status/verybadcat/CSharpMath/Build.svg)](https://github.com/verybadcat/CSharpMath/actions?query=workflow%3ABuild+branch%3Amaster) [![GitHub Test workflow shield](https://img.shields.io/github/workflow/status/verybadcat/CSharpMath/Test.svg?label=tests)](https://github.com/verybadcat/CSharpMath/actions?query=workflow%3ATest+branch%3Amaster)
+
+[![Average time to resolve an issue](http://isitmaintained.com/badge/resolution/verybadcat/CSharpMath.svg)](http://isitmaintained.com/project/verybadcat/CSharpMath "Average time to resolve an issue") [![Percentage of issues still open](http://isitmaintained.com/badge/open/verybadcat/CSharpMath.svg)](http://isitmaintained.com/project/verybadcat/CSharpMath "Percentage of issues still open") [![Issues welcome](https://img.shields.io/badge/issues-welcome-success)](https://github.com/verybadcat/CSharpMath/issues) [![Pull Requests welcome](https://img.shields.io/badge/pull_requests-welcome-success)](https://github.com/verybadcat/CSharpMath/issues) [![❤](https://img.shields.io/badge/made%20with-%e2%9d%a4-ff69b4.svg)](https://www.youtube.com/watch?v=dQw4w9WgXcQ "")
 
 [NuGet]: https://www.nuget.org/packages/CSharpMath/
 [NuGet-pre]: https://www.nuget.org/packages/CSharpMath/absoluteLatest