fix new NIO and new Swift compiler warnings (#179)

Author: weissi

Package.swift

@@ -23,7 +23,7 @@ let package = Package(
         .library(name: "NIOHTTP2", targets: ["NIOHTTP2"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/apple/swift-nio.git", from: "2.9.0"),
+        .package(url: "https://github.com/apple/swift-nio.git", from: "2.11.0"),
     ],
     targets: [
         .target(name: "NIOHTTP2Server",

Sources/NIOHPACK/HuffmanTables.swift

@@ -209,7 +209,7 @@ internal struct HuffmanDecoderFlags : OptionSet
 {
     var rawValue: UInt8
 
-    static let none     = HuffmanDecoderFlags(rawValue: 0b000)
+    static let none     = HuffmanDecoderFlags([])
     static let accepted = HuffmanDecoderFlags(rawValue: 0b001)
     static let symbol   = HuffmanDecoderFlags(rawValue: 0b010)
     static let failure  = HuffmanDecoderFlags(rawValue: 0b100)

Sources/NIOHTTP2/HTTP2FrameParser.swift

@@ -309,8 +309,8 @@ struct HTTP2FrameDecoder {
         switch (try self.processNextState()) {
         case .needMoreData:
             return nil
-        case .frame(let frame):
-            return frame
+        case .frame(let frame, let flowControlledLength):
+            return (frame, flowControlledLength)
         case .continue:
             // tail-call ourselves
             return try nextFrame()

Sources/NIOHTTP2/HTTP2StreamChannel.swift

@@ -136,7 +136,7 @@ final class HTTP2StreamChannel: Channel, ChannelCore {
         self.streamID = streamID
         self.multiplexer = multiplexer
         self.windowManager = InboundWindowManager(targetSize: Int32(targetWindowSize))
-        self._isWritable = Atomic(value: true)
+        self._isWritable = .makeAtomic(value: true)
         self.state = .idle
         self.writabilityManager = StreamChannelFlowController(highWatermark: outboundBytesHighWatermark,
                                                               lowWatermark: outboundBytesLowWatermark,
@@ -302,7 +302,7 @@ final class HTTP2StreamChannel: Channel, ChannelCore {
         return self._isWritable.load()
     }
 
-    private let _isWritable: Atomic<Bool>
+    private let _isWritable: NIOAtomic<Bool>
 
     public var isActive: Bool {
         return self.state == .active || self.state == .closing || self.state == .localActive