Add continue statement.

tests/looping.rs

@@ -12,8 +12,9 @@ fn test_loop() -> Result<(), EvalAltResult> {
 
 				loop {
 					if i < 10 {
+						i += 1;
+						if x > 20 { continue; }
 						x = x + i;
-						i = i + 1;
 					} else {
 						break;
 					}
@@ -22,7 +23,7 @@ fn test_loop() -> Result<(), EvalAltResult> {
 				return x;
 		"
         )?,
-        45
+        21
     );
 
     Ok(())

tests/while_loop.rs

@@ -6,8 +6,18 @@ fn test_while() -> Result<(), EvalAltResult> {
 
     assert_eq!(
         engine.eval::<INT>(
-            "let x = 0; while x < 10 { x = x + 1; if x > 5 { \
-             break } } x",
+            r"
+                let x = 0;
+
+                while x < 10 {
+                    x = x + 1;
+                    if x > 5 { break; }
+                    if x > 3 { continue; }
+                    x = x + 3;
+                }
+                
+                x
+        ",
         )?,
         6
     );