Add tasks for all the new languages

Task/Evolutionary-algorithm/Sidef/evolutionary-algorithm.sidef

@@ -0,0 +1,13 @@
+define target = "METHINKS IT IS LIKE A WEASEL"
+define mutate_chance = 0.08
+define alphabet = [('A'..'Z')..., ' ']
+define C = 100
+
+func fitness(str) { str.chars ~Z== target.chars -> count(true) }
+func mutate(str)  { str.gsub(/(.)/, {|s1| 1.rand < mutate_chance ? alphabet.pick : s1 }) }
+
+for (
+    var (i, parent) = (0, alphabet.rand(target.len).join);
+    parent != target;
+    parent = C.of{ mutate(parent) }.max_by(fitness)
+) { printf("%6d: '%s'\n", i++, parent) }