chore: Use lib_getopt for all hooks and some style tweaks (#137)

lib_getopt

@@ -2,9 +2,9 @@
 
 getopt() {
   # pure-getopt, a drop-in replacement for GNU getopt in pure Bash.
-  # version 1.4.3
+  # version 1.4.4
   #
-  # Copyright 2012-2018 Aron Griffis <aron@scampersand.com>
+  # Copyright 2012-2020 Aron Griffis <aron@scampersand.com>
   #
   # Permission is hereby granted, free of charge, to any person obtaining
   # a copy of this software and associated documentation files (the
@@ -37,7 +37,7 @@ getopt() {
     # "options -- parameters" on stdout.
 
     declare parsed status
-    declare short long name flags
+    declare short long='' name flags=''
     declare have_short=false
 
     # Synopsis from getopt man-page:
@@ -122,7 +122,7 @@ getopt() {
           return 4 ;;
 
         (-V|--version)
-          echo "pure-getopt 1.4.3"
+          echo "pure-getopt 1.4.4"
           return 0 ;;
 
         (--)
@@ -367,7 +367,7 @@ getopt() {
     # status 2.)  If there is no match at all, prints a message on stderr
     # and returns 2.
     declare a q="$1"
-    declare -a matches
+    declare -a matches=()
     shift
     for a; do
       if [[ $q == "$a" ]]; then
@@ -410,7 +410,7 @@ getopt() {
 
   _getopt_quote() {
     # Quotes arguments with single quotes, escaping inner single quotes
-    declare s space q=\'
+    declare s space='' q=\'
     for s; do
       printf "$space'%s'" "${s//$q/$q\\$q$q}"
       space=' '