Update Alamofire dependency to 4.0

Api.podspec

@@ -31,5 +31,5 @@ TODO: Add long description of the pod here.
 
   s.source_files = 'Api/Classes/**/*'
 
-  s.dependency 'Alamofire', '~> 4.0.0'
+  s.dependency 'Alamofire', '~> 4.0'
 end

Example/Podfile.lock

 PODS:
   - Alamofire (4.0.1)
-  - Api (0.1.0):
-    - Alamofire (~> 4.0.0)
+  - Api (0.1.1):
+    - Alamofire (~> 4.0)
   - Mockingjay (2.0.0):
     - Mockingjay/Core (= 2.0.0)
     - Mockingjay/XCTest (= 2.0.0)
@@ -25,7 +25,7 @@ EXTERNAL SOURCES:
 
 SPEC CHECKSUMS:
   Alamofire: 7682d43245de14874acd142ec137b144aa1dd335
-  Api: c5fe03a8024546f754f81b85c940bb14adafa7bc
+  Api: dce7e54cbbbbf707a4e1c47f3661447196b78ee7
   Mockingjay: 7122a3fc0597aa63438e4cd9b71b7bc8aac05b87
   Nimble: 56fc9f5020effa2206de22c3dd910f4fb011b92f
   Quick: 5d290df1c69d5ee2f0729956dcf0fd9a30447eaa