Update CHANGELOG and podspec for 7.1.0 release. (#864)

Author: mluisbrown

CHANGELOG.md

@@ -1,6 +1,7 @@
 # master
 *Please add new entries at the top.*
 
+# 7.1.0
 1. Add CI Release jobs on tag push (#862, kudos to @p4checo)
 1. Fix some issues related to locking, bumped min OS versions to iOS 10, macOS 10.12, tvOS 10, watchOS 3 (#859, kudos to @mluisbrown)
 1. Add `async` helpers to Schedulers (#857, kudos to @p4checo)

ReactiveSwift.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
   s.name         = "ReactiveSwift"
   # Version goes here and will be used to access the git tag later on, once we have a first release.
-  s.version      = "7.0.0"
+  s.version      = "7.1.0"
   s.summary      = "Streams of values over time"
   s.description  = <<-DESC
                    ReactiveSwift is a Swift framework inspired by Functional Reactive Programming. It provides APIs for composing and transforming streams of values over time.