Updated pod spec for Swift 4.2, Xcode 10.

Aleksandar Vacic · radianttap · commit b42900b63f30 · 2019-03-27T13:28:03.000+01:00
Updated watchOS deployment target to 3.0 because that’s now minimum for AppStoreConnect.
Bumped version.
diff --git a/SwiftyTimer.podspec b/SwiftyTimer.podspec
@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
   s.ios.deployment_target = '8.0'
   s.osx.deployment_target = '10.9'
   s.tvos.deployment_target = '9.0'
-  s.watchos.deployment_target = '2.0'
-
+  s.watchos.deployment_target = '3.0'
   s.source_files = 'Sources/*.swift'
+  s.swift_version = '4.2'
 end
