fix: fixed swiftlint error that appears in the new version of swiftlint

Kit/plugins/DB.swift

@@ -76,15 +76,15 @@ public class DB {
     
     public func insert(key: String, value: Codable, ts: Bool = true, force: Bool = false) {
         self.values[key] = value
-        guard let blobData = try? JSONEncoder().encode(value) else { return }
+        guard let blobData = try? JSONEncoder().encode(value), let str = String(data: blobData, encoding: .utf8)else { return }
         
         if ts {
-            self.lldb?.insert("\(key)@\(Date().currentTimeSeconds())", value: String(decoding: blobData, as: UTF8.self))
+            self.lldb?.insert("\(key)@\(Date().currentTimeSeconds())", value: str)
         }
         
         if !force, let ts = self.writeTS[key], (Date().timeIntervalSince1970-ts.timeIntervalSince1970) < 30 { return }
         
-        self.lldb?.insert(key, value: String(decoding: blobData, as: UTF8.self))
+        self.lldb?.insert(key, value: str)
         self.writeTS[key] = Date()
     }
     

Kit/plugins/Logger.swift

@@ -73,13 +73,13 @@ public class NextLog {
             let fileURL = fm.urls(for: .documentDirectory, in: .userDomainMask)[0].appendingPathComponent("log.txt")
             
             if !fm.fileExists(atPath: fileURL.path) {
-                try? "".data(using: .utf8)?.write(to: fileURL)
+                try? Data("".utf8).write(to: fileURL)
             }
             
             do {
                 let handle = try FileHandle(forWritingTo: fileURL)
                 handle.seekToEndOfFile()
-                handle.write("----------------\n".data(using: .utf8)!)
+                handle.write(Data("----------------\n".utf8))
                 self.writer = FileHandlerOutputStream(handle)
             } catch let err {
                 print("error to init file handler: \(err)")

Kit/plugins/Reachability.swift

@@ -58,7 +58,7 @@ public class Reachability {
                 _ = unmanagedReachability.retain()
                 return UnsafeRawPointer(unmanagedReachability.toOpaque())
             },
-            release: { (info: UnsafeRawPointer) -> Void in
+            release: { (info: UnsafeRawPointer) in
                 Unmanaged<Reachability>.fromOpaque(info).release()
             },
             copyDescription: nil