Don't do anything but re-bind widgets on each precmd

There's no need to re-run feature detection or async_start on every
precmd. Just do those once.

src/start.zsh

@@ -5,9 +5,17 @@
 
 # Start the autosuggestion widgets
 _zsh_autosuggest_start() {
+	add-zsh-hook -d precmd _zsh_autosuggest_start
+
 	_zsh_autosuggest_feature_detect
 	_zsh_autosuggest_bind_widgets
 
+	# Re-bind widgets on every precmd to ensure we wrap other wrappers.
+	# Specifically, highlighting breaks if our widgets are wrapped by
+	# zsh-syntax-highlighting widgets. This also allows modifications
+	# to the widget list variables to take effect on the next precmd.
+	add-zsh-hook precmd _zsh_autosuggest_bind_widgets
+
 	if [ -n "${ZSH_AUTOSUGGEST_USE_ASYNC+x}" ]; then
 		_zsh_autosuggest_async_start
 	fi

zsh-autosuggestions.zsh

@@ -609,9 +609,17 @@ _zsh_autosuggest_async_start() {
 
 # Start the autosuggestion widgets
 _zsh_autosuggest_start() {
+	add-zsh-hook -d precmd _zsh_autosuggest_start
+
 	_zsh_autosuggest_feature_detect
 	_zsh_autosuggest_bind_widgets
 
+	# Re-bind widgets on every precmd to ensure we wrap other wrappers.
+	# Specifically, highlighting breaks if our widgets are wrapped by
+	# zsh-syntax-highlighting widgets. This also allows modifications
+	# to the widget list variables to take effect on the next precmd.
+	add-zsh-hook precmd _zsh_autosuggest_bind_widgets
+
 	if [ -n "${ZSH_AUTOSUGGEST_USE_ASYNC+x}" ]; then
 		_zsh_autosuggest_async_start
 	fi