Vendor dependencies

Let's see how I like this workflow.

vendor/wasm-bindgen/releases/friends.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+set -eu
+set -o pipefail
+
+cd $(dirname $0)
+
+if [[ -z "${1+x}" ]]; then
+    read -p "List friends since which commit/tag? " since
+    echo
+else
+    since=$1
+fi
+
+git shortlog -s -n "$since.." \
+    | cut -f 2- \
+    | sort -u \
+    | grep -v bors\-servo \
+    | xargs -d '\n' -I{} echo "- {}"