Add tasks for all the new languages

Task/Least-common-multiple/Lasso/least-common-multiple.lasso

@@ -0,0 +1,19 @@
+define gcd(a,b) => {
+	while(#b != 0) => {
+		local(t = #b)
+		#b = #a % #b
+		#a = #t
+	}
+	return #a
+}
+define lcm(m,n) => {
+	 #m == 0 || #n == 0 ? return 0
+	 local(r = (#m * #n) / decimal(gcd(#m, #n)))
+	 return integer(#r)->abs
+}
+
+lcm(-6, 14)
+lcm(2, 0)
+lcm(12, 18)
+lcm(12, 22)
+lcm(7, 31)