Update podspec

.swift-version

@@ -0,0 +1 @@
+3.0

BrainCore.podspec

@@ -1,17 +1,17 @@
 Pod::Spec.new do |s|
   s.name         = "BrainCore"
-  s.version      = "0.3.2"
+  s.version      = "0.4.0"
   s.summary      = "The iOS and OS X neural network framework"
   s.homepage     = "https://github.com/aleph7/BrainCore"
   s.license      = "MIT"
   s.author       = { "Alejandro Isaza" => "[email protected]" }
 
-  s.ios.deployment_target = "8.4"
+  s.ios.deployment_target = "9.0"
   s.osx.deployment_target = "10.11"
 
   s.source = { git: "https://github.com/aleph7/BrainCore.git", tag: s.version, submodules: true }
   s.source_files = "Source/**/*.swift", "Source/Metal/*.metal", "Source/Metal/*.h"
   s.private_header_files = "Source/Metal/*.h"
 
-  s.dependency "Upsurge", '~> 0.7'
+  s.dependency "Upsurge", '~> 0.8'
 end