feat(bin): x-gh-get-latest-* release and version helpers

local/bin/x-gh-get-latest-version

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+REPO=$1
+
+if [ -z "$REPO" ]; then
+  echo "Usage: $0 <repo> (e.g. ivuorinen/dotfiles)"
+  exit 1
+fi
+
+VERSION=$(
+  curl -s "https://api.github.com/repos/${REPO}/releases/latest" \
+    | grep "tag_name" \
+    | awk '{print substr($2, 2, length($2)-3)}'
+)
+
+echo "$VERSION"
+
+# vim: set ts=2 sw=2 ft=sh et: