fix compile error in Xcode 10.2

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+- fix compile error in Xcode 10.2
+
 ## [1.3.2]
 
 ### Added

Sources/BatteryView.swift

@@ -134,7 +134,7 @@ extension Int {
     private func layoutLevel() {
         var levelFrame = bodyOutline.bounds.insetBy(dx: bodyOutline.borderWidth, dy: bodyOutline.borderWidth)
         if level >= 0 && level <= .fullBattery {
-            let levelInset = (isVertical ? levelFrame.height : levelFrame.width) * CGFloat(.fullBattery - level) / CGFloat(.fullBattery)
+            let levelInset = (isVertical ? levelFrame.height : levelFrame.width) * CGFloat(.fullBattery - level) / CGFloat(Int.fullBattery)
             (_, levelFrame) = levelFrame.divided(atDistance: levelInset, from: direction)
         }
         levelFill.frame = levelFrame.integral