Bump version to 4.2.1 and prepare for release

I've gone with a patch version bump because I think the changed
behaviour is closer to a bug fix than it is to backward-compatible
additional functionality (minor version bump) or to a
backward-incompatible change (major version bump).

NOTE. I've manually bumped the version in the individual gemfile.lock
files because running `bundle update --conservative rpi_auth` resulted
in updates to a number of other unrelated Gems and I didn't want to have
to consider those in this PR.

Author: chrisroos

CHANGELOG.md

@@ -13,6 +13,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
+## [v4.2.1]
+
+### Fixed
+
+- Refresh access tokens before expiry (#89)
+
 ## [v4.2.0]
 
 ### Added
@@ -154,7 +160,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - rails model concern to allow host app to add auth behaviour to a model
 - callback, logout and failure routes to handle auth
 
-[Unreleased]: https://github.com/RaspberryPiFoundation/rpi-auth/compare/v4.2.0...HEAD
+[Unreleased]: https://github.com/RaspberryPiFoundation/rpi-auth/compare/v4.2.1...HEAD
+[v4.2.1]: https://github.com/RaspberryPiFoundation/rpi-auth/releases/tag/v4.2.1
 [v4.2.0]: https://github.com/RaspberryPiFoundation/rpi-auth/releases/tag/v4.2.0
 [v4.1.1]: https://github.com/RaspberryPiFoundation/rpi-auth/releases/tag/v4.1.1
 [v4.1.0]: https://github.com/RaspberryPiFoundation/rpi-auth/releases/tag/v4.1.0

gemfiles/rails_6.1.gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    rpi_auth (4.2.0)
+    rpi_auth (4.2.1)
       oauth2
       omniauth-rails_csrf_protection (~> 1.0.0)
       omniauth_openid_connect (~> 0.7.1)

gemfiles/rails_7.0.gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    rpi_auth (4.2.0)
+    rpi_auth (4.2.1)
       oauth2
       omniauth-rails_csrf_protection (~> 1.0.0)
       omniauth_openid_connect (~> 0.7.1)

gemfiles/rails_7.1.gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    rpi_auth (4.2.0)
+    rpi_auth (4.2.1)
       oauth2
       omniauth-rails_csrf_protection (~> 1.0.0)
       omniauth_openid_connect (~> 0.7.1)

gemfiles/rails_7.2.gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    rpi_auth (4.2.0)
+    rpi_auth (4.2.1)
       oauth2
       omniauth-rails_csrf_protection (~> 1.0.0)
       omniauth_openid_connect (~> 0.7.1)

lib/rpi_auth/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module RpiAuth
-  VERSION = '4.2.0'
+  VERSION = '4.2.1'
 end