Add a random module.

test/random/int_min_max.wren

@@ -0,0 +1,18 @@
+import "random" for Random
+
+var random = Random.new(12345)
+
+var counts = [0, 0, 0, 0, 0, 0, 0, 0]
+for (i in 1..10000) {
+  var n = random.int(3, 8)
+  counts[n] = counts[n] + 1
+}
+
+for (i in 0..2) {
+  if (counts[i] != 0) System.print("too low value")
+}
+
+for (i in 3..7) {
+  if (counts[i] < 1900) System.print("too few")
+  if (counts[i] > 2100) System.print("too many")
+}