Add fib test

tests/fib.sols

@@ -0,0 +1,15 @@
+a = 0
+b = 1
+n = 92
+
+i = 0
+
+while i != n {
+    temp = a + b
+    a = b
+    b = temp
+
+    i = i + 1
+}
+
+puts a