📝 Add badges of supported Vim/Neovim versions

Author: lambdalisue

README.md

@@ -1,5 +1,7 @@
 # 🐜 denops_std
 
+[![Vim 8.2.3452 or above](https://img.shields.io/badge/Vim-Support%208.2.3452-yellowgreen.svg?logo=vim)](https://github.com/vim/vim/tree/v8.2.3452)
+[![Neovim 0.6.0 or above](https://img.shields.io/badge/Neovim-Support%200.6.0-yellowgreen.svg?logo=neovim&logoColor=white)](https://github.com/neovim/neovim/tree/v0.6.0)
 [![Test](https://github.com/vim-denops/deno-denops-std/actions/workflows/test.yml/badge.svg)](https://github.com/vim-denops/deno-denops-std/actions/workflows/test.yml)
 [![deno doc](https://doc.deno.land/badge.svg)](https://doc.deno.land/https/deno.land/x/denops_std/mod.ts)
 [![Documentation](https://img.shields.io/badge/denops-Documentation-yellow.svg)](https://vim-denops.github.io/denops-documentation/)