fix: add changelog.sh (#18)

Author: Evalir

scripts/changelog.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -e -o pipefail
+
+root=$(dirname "$(dirname "$0")")
+cmd=(git cliff --workdir "$root" --output "$root/CHANGELOG.md" "$@")
+
+if [ "$DRY_RUN" = "true" ]; then
+    echo "skipping due to dry run: ${cmd[*]}" >&2
+    exit 0
+else
+    "${cmd[@]}"
+fi