Update vim version check for enabling vimdebug

build/build.plugin.zsh

@@ -7,7 +7,7 @@ alias build="build-dir --build"
 # Detect installed debugger and set the `debug` alias to debug a program with
 # command line arguments.
 if [ `uname` = Linux ]; then
-  if [[ "`vim --version`" =~ "^VIM - Vi IMproved 8\.1.*$" ]]; then
+  if [[ "`vim --version|head -1|cut -c 19-21`" =~ "^8\.[123456789]$" ]]; then
     autoload -U regexp-replace
     function vimdebug() {
       # For each item in $* replace * and \* and then replace \ with \\