Making variables local in jira plugin

plugins/jira/jira.plugin.zsh

@@ -19,6 +19,7 @@ open_jira_issue () {
     open_cmd='xdg-open'
   fi
 
+  local jira_url
   if [ -f .jira-url ]; then
     jira_url=$(cat .jira-url)
   elif [ -f ~/.jira-url ]; then
@@ -30,6 +31,7 @@ open_jira_issue () {
     return 1
   fi
 
+  local jira_prefix
   if [ -f .jira-prefix ]; then
     jira_prefix=$(cat .jira-prefix)
   elif [ -f ~/.jira-prefix ]; then
@@ -76,7 +78,11 @@ jira_name () {
 }
 
 jira_query () {
+  local jira_name
+  local verb
   verb="$1"
+  local lookup
+  local preposition
   if [[ "${verb}" = "reported" ]]; then
     lookup=reporter
     preposition=by