scanner: experimental ≠ etc support

vlib/builtin/int_test.v

@@ -9,3 +9,9 @@ fn test_const() {
 	assert a == 3 
 	assert u == u64(1) 
 } 
+
+fn test_cmp() {
+	assert 1 ≠ 2
+	assert 1 ⩽ 2
+	assert 1 ⩾ 0
+}