Fixed linting issues with the Podspec (#96)

Author: Reid Main

.swift-version

@@ -1,6 +1,6 @@
 language: objective-c
 osx_image: xcode10.2
 before_script:
-  - gem install cocoapods -v 1.7.2 --no-document
+  - gem install cocoapods -v 1.7.3 --no-document
 script:
   ./build.sh

.travis.yml

@@ -13,8 +13,8 @@ EXTERNAL SOURCES:
     :path: ".."
 
 SPEC CHECKSUMS:
-  iOSSnapshotTestCase: e2327510ffdcd92a71a8864465c0758e6eef3859
+  iOSSnapshotTestCase: de1e49be9e60425fb0c3c70949c600f49c0d19c2
 
 PODFILE CHECKSUM: 7497b446d0ae369712f3801ef5b32886254e66ef
 
-COCOAPODS: 1.7.2
+COCOAPODS: 1.7.3

FBSnapshotTestCaseDemo/Podfile.lock

@@ -16,7 +16,8 @@ Pod::Spec.new do |s|
   s.source       = { :git => "https://github.com/uber/ios-snapshot-test-case.git",
                      :tag => s.version.to_s }
   s.ios.deployment_target  = '10.0'
-  s.tvos.deployment_target = '9.0'
+  s.tvos.deployment_target = '10.0'
+  s.swift_version = '5.0.1'
   s.requires_arc = true
   s.frameworks   = 'XCTest','UIKit','Foundation','QuartzCore'
   s.pod_target_xcconfig = { 'ENABLE_BITCODE' => 'NO' }