Don't test bitwise operations on operands that don't fit in u32.

The current behavior is undefined in C when converting the double to a
u32, so the tests fail on some compilers. For now, I'm just removing
those parts of the tests because I'm not sure what I want the behavior
to be. Modulo? Truncate? Runtime error?

src/vm/wren_core.c

@@ -618,9 +618,7 @@ DEF_PRIMITIVE(num_bangeq)
 DEF_PRIMITIVE(num_bitwiseNot)
 {
   // Bitwise operators always work on 32-bit unsigned ints.
-  uint64_t wideVal = AS_NUM(args[0]);
-  uint32_t val = wideVal & 0xFFFFFFFF;
-  RETURN_NUM(~(uint32_t)val);
+  RETURN_NUM(~(uint32_t)AS_NUM(args[0]));
 }
 
 DEF_PRIMITIVE(num_dotDot)