Update README.md

Author: junyuan-chen

README.md

@@ -2,10 +2,20 @@
 
 *Base package for [DiffinDiffs.jl](https://github.com/JuliaDiffinDiffs/DiffinDiffs.jl)*
 
-[![CI-stable](https://github.com/JuliaDiffinDiffs/DiffinDiffsBase.jl/workflows/CI-stable/badge.svg)](https://github.com/JuliaDiffinDiffs/DiffinDiffsBase.jl/actions?query=workflow%3ACI-stable)
-[![codecov](https://codecov.io/gh/JuliaDiffinDiffs/DiffinDiffsBase.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/JuliaDiffinDiffs/DiffinDiffsBase.jl)
+[![CI-stable][CI-stable-img]][CI-stable-url]
+[![PkgEval][pkgeval-img]][pkgeval-url]
+[![codecov][codecov-img]][codecov-url]
 
-This package provides types, functions and macros
+[CI-stable-img]: https://github.com/JuliaDiffinDiffs/DiffinDiffsBase.jl/workflows/CI-stable/badge.svg
+[CI-stable-url]: https://github.com/JuliaDiffinDiffs/DiffinDiffsBase.jl/actions?query=workflow%3ACI-stable
+
+[pkgeval-img]: https://juliaci.github.io/NanosoldierReports/pkgeval_badges/D/DiffinDiffsBase.svg
+[pkgeval-url]: https://juliaci.github.io/NanosoldierReports/pkgeval_badges/D/DiffinDiffsBase.html
+
+[codecov-img]: https://codecov.io/gh/JuliaDiffinDiffs/DiffinDiffsBase.jl/branch/master/graph/badge.svg
+[codecov-url]: https://codecov.io/gh/JuliaDiffinDiffs/DiffinDiffsBase.jl
+
+This package provides types, functions, macros and [example data](data)
 that are shared among other component packages of
 [DiffinDiffs.jl](https://github.com/JuliaDiffinDiffs/DiffinDiffs.jl).
 It is not intended to be used as a standalone package.