feat(p2p): random peer exchange

src/background/shuffle.js

@@ -0,0 +1,14 @@
+/**
+ * Shuffles array in place.
+ * @param {Array} a items An array containing the items.
+ */
+export default function shuffle(a) {
+    let j, x, i;
+    for (i = a.length - 1; i > 0; i--) {
+        j = Math.floor(Math.random() * (i + 1));
+        x = a[i];
+        a[i] = a[j];
+        a[j] = x;
+    }
+    return a
+}