Adding missing developers since 4.0 development

CONTRIBUTORS.md

@@ -113,3 +113,30 @@
 - Josh Zlatin
 - [Zou Guangxian](https://github.com/zouguangxian)
 - [4ft35t](https://github.com/4ft35t)
+- [Andy Clapson](https://github.com/Homesteady)
+- [Anuraag Agrawal](https://github.com/anuraaga)
+- [Christian Aistleitner](https://github.com/somechris)
+- [Dennis Brown](https://github.com/MutableLoss)
+- [Dexter Chang](https://github.com/dextermallo)
+- [Esa Jokinen](https://github.com/oh2fih)
+- [Finn Westendorf](https://github.com/wfinn)
+- [Gwendal Le Coguic](https://github.com/gwen001)
+- [Jean-François Viguier](https://github.com/jf-viguier)
+- [Juan Pablo Tosso](https://github.com/jptosso)
+- [Karel](https://github.com/karelorigin)
+- [Khiem Doan](https://github.com/khiemdoan)
+- [Mark Zeman](https://github.com/KramNamez)
+- [Priyam Patel](https://github.com/priyam001)
+- [Robert DeBoer](https://github.com/robertdeboer)
+- [Somdev Sangwan](https://github.com/s0md3v)
+- [Stephen Sigwart](https://github.com/ssigwart)
+- [Zerorigin](https://github.com/Zerorigin)
+- [Syin Wu](https://github.com/bxlxx)
+- [henkdswiss](https://github.com/henkworks)
+- [ignatiev](https://github.com/ignatiev)
+- [oct0pus7](https://github.com/oct0pus7)
+- [Timo](https://github.com/ntimo)
+- [rekter0](https://github.com/rekter0)
+- [ThanhPT](https://github.com/thanhpt1708)
+- [Vandan Rohatgi](https://github.com/vandanrohatgi)
+- [NiceYouKnow](https://github.com/NiceYouKnow)