helper (improvement): added safegaurd for unsaved changes

lib/helpers.bash

@@ -224,6 +224,10 @@ _bash-it-update-() {
 
   cd "${BASH_IT}" || return
 
+  DIFF=$(git diff --name-status)
+  [ ${#DIFF} -gt 0 ] && echo -e "Either commit your changes using git commit, or clean them...\n\n$DIFF" && return 1
+  
+
   if [ -z "$BASH_IT_REMOTE" ]; then
     BASH_IT_REMOTE="origin"
   fi