Fix #247 and #248 without using `(b)` flag

To support older versions of zsh (< 5.0.8).

We were missing the EXTENDED_GLOB option that allows use of `(#m)` flag.

src/strategies/match_prev_cmd.zsh

@@ -21,6 +21,12 @@
 # `HIST_EXPIRE_DUPS_FIRST`.
 
 _zsh_autosuggest_strategy_match_prev_cmd() {
+	# Reset options to defaults and enable LOCAL_OPTIONS
+	emulate -L zsh
+
+	# Enable globbing flags so that we can use (#m)
+	setopt EXTENDED_GLOB
+
 	# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
 	local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
 

zsh-autosuggestions.zsh

@@ -528,6 +528,12 @@ _zsh_autosuggest_strategy_default() {
 # `HIST_EXPIRE_DUPS_FIRST`.
 
 _zsh_autosuggest_strategy_match_prev_cmd() {
+	# Reset options to defaults and enable LOCAL_OPTIONS
+	emulate -L zsh
+
+	# Enable globbing flags so that we can use (#m)
+	setopt EXTENDED_GLOB
+
 	# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
 	local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"