Support Swift 5.1 (#222)

Author: djones6

.travis.yml

@@ -47,6 +47,10 @@ matrix:
     - os: osx
       osx_image: xcode10.2
       sudo: required
+    - os: osx
+      osx_image: xcode11
+      sudo: required
+      env: SWIFT_SNAPSHOT=5.1
     - os: osx
       osx_image: xcode10.1
       sudo: required

Sources/SwiftBAMDC/SwiftMetricsBAMConfig.swift

@@ -26,6 +26,12 @@ import Foundation
 import Dispatch
 import Configuration
 
+#if swift(>=4.1)
+  #if canImport(FoundationNetworking)
+    import FoundationNetworking
+  #endif
+#endif
+
 /*
  #if os(macOS) || os(iOS) || os(tvOS) || os(watchOS)
  import CommonCrypto

Sources/SwiftMetricsBluemix/SwiftMetricsBluemix.swift

@@ -23,6 +23,12 @@ import SwiftMetrics
 import SwiftMetricsKitura
 import SwiftBAMDC
 
+#if swift(>=4.1)
+  #if canImport(FoundationNetworking)
+    import FoundationNetworking
+  #endif
+#endif
+
 fileprivate struct HttpStats {
   fileprivate var count: Double = 0
   fileprivate var duration: Double = 0

Tests/SwiftMetricsRESTTests/SwiftMetricsRESTTests.swift

@@ -20,6 +20,12 @@ import Configuration
 import Foundation
 @testable import SwiftMetricsREST
 
+#if swift(>=4.1)
+  #if canImport(FoundationNetworking)
+    import FoundationNetworking
+  #endif
+#endif
+
 class SwiftMetricsRESTTests: XCTestCase {
 
     let collectionsSubpath = "/swiftmetrics/api/v1/collections"