commit new README.md

Author: skywind3000

README.md

@@ -287,6 +287,7 @@ See: [Cooperate with famous plugins](https://github.com/skywind3000/asyncrun.vim
 
 ## History
 
+- 2.2.1 (2020-01-20): set noreletivenumber for terminal window.
 - 2.2.0 (2020-01-18): new `-focus=0` option for `-mode=term` to prevent focus change.
 - 2.1.9 (2020-01-12): polish `-mode=term`, omit `number` and `signcolunm` in terminal.
 - 2.1.8 (2020-01-11): new options `errorformat` in `asyncrun#run(...)`.