Convert to swift 5

Fuse/Classes/Fuse.swift

@@ -113,7 +113,7 @@ public class Fuse {
 
         // Exact match
         if (pattern.text == text) {
-            return (0, [CountableClosedRange<Int>(0...textLength - 1)])
+            return (0, [0...textLength - 1])
         }
 
         let location = self.location

Fuse/Classes/FuseUtilities.swift

@@ -63,12 +63,12 @@ class FuseUtilities {
                 start = n
             } else if bit == 0 && start != -1 {
                 end = n - 1
-                ranges.append(CountableClosedRange<Int>(start...end))
+                ranges.append(start...end)
                 start = -1
             }
         }
         if mask.last == 1 {
-            ranges.append(CountableClosedRange<Int>(start...mask.count - 1))
+            ranges.append(start...mask.count - 1)
         }
         return ranges
     }