add commits since last release to README

README.md

@@ -2,7 +2,7 @@
 
 | **Documentation** | **Status** | **Community** | **License** |
 |:-----------------:|:----------:|:-------------:|:-----------:|
-| [![docs-dev][dev-img]][dev-url] | [![CI][ci-img]][ci-url] [![codecov][cov-img]][cov-url] [![aqua][aqua-img]][aqua-url] [![dev-commits][dev-commits-url]][dev-commits-target] | [![zulip][chat-img]][chat-url] | [![license][lic-img]][lic-url] |
+| [![docs-dev][dev-img]][dev-url] | [![CI][ci-img]][ci-url] [![codecov][cov-img]][cov-url] [![aqua][aqua-img]][aqua-url] | [![zulip][chat-img]][chat-url] | [![license][lic-img]][lic-url] |
 
 [dev-img]: https://img.shields.io/badge/docs-latest-blue.svg
 [dev-url]: https://juliareach.github.io/MathematicalSets.jl/dev/
@@ -12,8 +12,6 @@
 [cov-url]: https://app.codecov.io/github/JuliaReach/MathematicalSets.jl
 [aqua-img]: https://raw.githubusercontent.com/JuliaTesting/Aqua.jl/master/badge.svg
 [aqua-url]: https://github.com/JuliaTesting/Aqua.jl
-[dev-commits-url]: https://img.shields.io/github/commits-since/JuliaReach/MathematicalSets.jl/latest.svg
-[dev-commits-target]: https://github.com/JuliaReach/MathematicalSets.jl
 [chat-img]: https://img.shields.io/badge/zulip-join_chat-brightgreen.svg
 [chat-url]: https://julialang.zulipchat.com/#narrow/stream/278609-juliareach
 [lic-img]: https://img.shields.io/github/license/mashape/apistatus.svg