Add PkgEval badge to README.md (#81)

Author: jishnub

README.md

@@ -1,13 +1,15 @@
 # ApproxFunSingularities.jl
 Support for spaces with singularities in ApproxFun
 
-[![](https://img.shields.io/badge/docs-stable-blue.svg)](https://JuliaApproximation.github.io/ApproxFun.jl/stable)
-[![](https://img.shields.io/badge/docs-dev-blue.svg)](https://JuliaApproximation.github.io/ApproxFun.jl/dev)
 [![CI](https://github.com/JuliaApproximation/ApproxFunSingularities.jl/actions/workflows/ci.yml/badge.svg)](https://github.com/JuliaApproximation/ApproxFunSingularities.jl/actions/workflows/ci.yml)
+[![IntegrationTest](https://github.com/JuliaApproximation/ApproxFunSingularities.jl/actions/workflows/downstream.yml/badge.svg)](https://github.com/JuliaApproximation/ApproxFunSingularities.jl/actions/workflows/downstream.yml)
 [![codecov](https://codecov.io/gh/JuliaApproximation/ApproxFunSingularities.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/JuliaApproximation/ApproxFunSingularities.jl)
 [![deps](https://juliahub.com/docs/ApproxFunSingularities/deps.svg)](https://juliahub.com/ui/Packages/ApproxFunSingularities/43LpP?t=2)
 [![version](https://juliahub.com/docs/ApproxFunSingularities/version.svg)](https://juliahub.com/ui/Packages/ApproxFunSingularities/43LpP)
 [![pkgeval](https://juliahub.com/docs/General/ApproxFunSingularities/stable/pkgeval.svg)](https://juliahub.com/ui/Packages/General/ApproxFunSingularities)
+
+[![](https://img.shields.io/badge/docs-stable-blue.svg)](https://JuliaApproximation.github.io/ApproxFun.jl/stable)
+[![](https://img.shields.io/badge/docs-dev-blue.svg)](https://JuliaApproximation.github.io/ApproxFun.jl/dev)
 [![Join the chat at https://gitter.im/JuliaApproximation/ApproxFun.jl](https://badges.gitter.im/JuliaApproximation/ApproxFun.jl.svg)](https://gitter.im/JuliaApproximation/ApproxFun.jl?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)