Fix `(fixnum_value ... float_value).min` with `mruby-range-ext`
Before this patch:
$ bin/mruby -e 'p (2...4.0).min'  #=> TypeError
After this patch (same as CRuby and without `mruby-range-ext`):
$ bin/mruby -e 'p (2...4.0).min'  #=> 2
@@ -53,7 +53,6 @@ class Range
# fast path for numerics
if (val.kind_of?(Fixnum) || val.kind_of?(Float)) && (last.kind_of?(Fixnum) || last.kind_of?(Float))
- raise TypeError if exclude_end? && !last.kind_of?(Fixnum)
return nil if val > last
return nil if val == last && exclude_end?
