build: repair the Windows build after #3040, #3058 (#3066)

* build: repair the Windows build after #3040, #3058

Repair the Windows builds after the breakage introduced by #3040 and 3058.

* build: repair Windows build after #3063

Author: compnerd

Sources/Basics/HTTPClient.swift

@@ -20,6 +20,10 @@ import TSCUtility
 import Glibc
 #endif
 
+#if os(Windows)
+import CRT
+#endif
+
 // MARK: - HTTPClient
 
 public struct HTTPClient {

Sources/PackageCollections/Providers/GitHubPackageMetadataProvider.swift

@@ -28,7 +28,7 @@ struct GitHubPackageMetadataProvider: PackageMetadataProvider {
         self.httpClient = httpClient ?? .init()
         self.defaultHttpClient = httpClient == nil
         self.decoder = JSONDecoder()
-        #if os(Linux)
+        #if os(Linux) || os(Windows)
         self.decoder.dateDecodingStrategy = .iso8601
         #else
         if #available(macOS 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *) {

Sources/PackageCollections/Providers/JSONPackageCollectionProvider.swift

@@ -27,7 +27,7 @@ struct JSONPackageCollectionProvider: PackageCollectionProvider {
         self.httpClient = httpClient ?? .init()
         self.defaultHttpClient = httpClient == nil
         self.decoder = JSONDecoder()
-        #if os(Linux)
+        #if os(Linux) || os(Windows)
         self.decoder.dateDecodingStrategy = .iso8601
         #else
         if #available(macOS 10.12, iOS 10.0, watchOS 3.0, tvOS 10.0, *) {