Fixed up testing etc

tests/test_typeExpr.krak

@@ -0,0 +1,20 @@
+import io;
+
+typedef ClassWithConstructor {
+    |int| data;
+    |ClassWithConstructor*| construct(|int| inData) {
+        data = inData;
+        return this;
+    }
+    |void| printData() {
+        io::println(data);
+    }
+};
+
+|int| main() {
+    |ClassWithConstructor| object.construct(4);
+    object.printData();
+    |int| a = 8;
+    io::println(a);
+    return 0;
+}