Fix signature of UintBetween generator functions (#131)

faker.go

@@ -199,23 +199,23 @@ func (f Faker) UIntBetween(min, max uint) uint {
 }
 
 // UInt8Between returns a fake UInt8 between a given minimum and maximum values for Faker
-func (f Faker) UInt8Between(min, max int8) uint8 {
-	return uint8(f.IntBetween(int(min), int(max)))
+func (f Faker) UInt8Between(min, max uint8) uint8 {
+	return uint8(f.UIntBetween(uint(min), uint(max)))
 }
 
 // UInt16Between returns a fake UInt16 between a given minimum and maximum values for Faker
-func (f Faker) UInt16Between(min, max int16) uint16 {
-	return uint16(f.IntBetween(int(min), int(max)))
+func (f Faker) UInt16Between(min, max uint16) uint16 {
+	return uint16(f.UIntBetween(uint(min), uint(max)))
 }
 
 // UInt32Between returns a fake UInt32 between a given minimum and maximum values for Faker
 func (f Faker) UInt32Between(min, max uint32) uint32 {
-	return uint32(f.IntBetween(int(min), int(max)))
+	return uint32(f.UIntBetween(uint(min), uint(max)))
 }
 
 // UInt64Between returns a fake UInt64 between a given minimum and maximum values for Faker
 func (f Faker) UInt64Between(min, max uint64) uint64 {
-	return uint64(f.IntBetween(int(min), int(max)))
+	return uint64(f.UIntBetween(uint(min), uint(max)))
 }
 
 // Letter returns a fake single letter for Faker