Update SDK version (#70)

Author: andrewjl-mux

Sources/MuxUploadSDK/PublicAPI/Version.swift

@@ -11,9 +11,9 @@ public struct Version {
   /// Major version.
   public static let major = 0
   /// Minor version.
-  public static let minor = 3
+  public static let minor = 4
   /// Revision number.
-  public static let revision = 1
+  public static let revision = 0
 
   /// String form of the version number.
   public static let versionString = "\(major).\(minor).\(revision)"