update version

Author: rcmdnk

lib/vim_ahk.ahk

@@ -19,8 +19,8 @@
 
 class VimAhk{
   __About(){
-    this.About.Version := "v0.8.3"
-    this.About.Date := "19/Oct/2020"
+    this.About.Version := "v0.8.4"
+    this.About.Date := "20/Oct/2020"
     this.About.Author := "rcmdnk"
     this.About.Description := "Vim emulation with AutoHotkey, everywhere in Windows."
     this.About.Homepage := "https://github.com/rcmdnk/vim_ahk"