Add a random module.

test/random/new_sequence.wren

@@ -0,0 +1,12 @@
+import "random" for Random
+
+var random1 = Random.new([1, 2, 3])
+var random2 = Random.new([1, 2, 3])
+
+var correct = 0
+for (i in 1..100) {
+  // Should produce the same values.
+  if (random1.float() == random2.float()) correct = correct + 1
+}
+
+System.print(correct) // expect: 100