Run release checks with the stock macOS Bash

scripts/release-check.sh

@@ -35,7 +35,10 @@ git ls-files --cached --others --exclude-standard -z |
 diff -u go.mod "$temporary_dir/go.mod"
 diff -u go.sum "$temporary_dir/go.sum"
 
-mapfile -d '' go_files < <(git ls-files --cached --others --exclude-standard -z -- '*.go')
+go_files=()
+while IFS= read -r -d '' go_file; do
+  go_files+=("$go_file")
+done < <(git ls-files --cached --others --exclude-standard -z -- '*.go')
 if ((${#go_files[@]})); then
   unformatted=$(gofmt -l -- "${go_files[@]}")
   if [[ -n "$unformatted" ]]; then