Prep for 1.2.3 release (#144)

* Update changelog for 1.2.3 release.

* Update GTMAppAuth.podspec

* Fix typo.

* Fix date formatting.

* Update CHANGELOG.md

Author: petea

CHANGELOG.md

@@ -1,10 +1,15 @@
 # GTMAppAuth Changelog
 
-## 1.2.2 (2021-05-4)
+## 1.2.3 (2022-03-22)
+
+* Fixed Keychain duplicate entry error on macOS. ([#138](https://github.com/google/GTMAppAuth/pull/138))
+* Match GTMSessionFetcher's min macOS version to avoid warnings. ([#142](https://github.com/google/GTMAppAuth/pull/142))
+
+## 1.2.2 (2021-05-04)
 
 * Fixed Swift Package Manager issue with Xcode 12.5.
 
-## 1.2.1 (2021-04-2)
+## 1.2.1 (2021-04-02)
 
 * Address CocoaPod packaging issue in the 1.2.0 release.
 

GTMAppAuth.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "GTMAppAuth"
-  s.version      = "1.2.2"
+  s.version      = "1.2.3"
   s.summary      = "Authorize GTM Session Fetcher requests with AppAuth via GTMAppAuth"
 
   s.description  = <<-DESC