Fix CI failure on Windows environment.
`1L` on Windows means `32 bit int`.
MODIFY
mrbgems/mruby-rational/src/rational.c
mrbgems/mruby-rational/src/rational.c
@@ -188,7 +188,7 @@ rational_new_f(mrb_state *mrb, mrb_float f0)
else {
n = -n;
}
- return rational_new_i(mrb, f, 1L<<n);
+ return rational_new_i(mrb, f, ((mrb_int)1)<<n);
#else
mrb_int pow = 1;
if (n < 0) {

Fix CI failure on Windows environment.

`1L` on Windows means `32 bit int`.