Prepare for 1.5.0 release (openid#692)

* Bump podspec version for 1.5.0 release.

* Update changelog for 1.5.0 release.

Added changelog for 1.4.0

Version 1.3.0

- Support for Mac Catalyst

Version 1.2.0

- iOS 13 support

1.1.0 release

1.0.0 release

0.95.1 release

1.0.0.rc1 release

dev-logout on the pre 1.0 branch prior to rebase