Changelog updates for 3.1.0

[matux]

Description of the change

This PR bumps the version of the Rollbar Notifier to 3.1.0 and updates the changelog for said version.

CHANGELOG

3.1.0

• The KSCrash dependency has been completely dropped.
  • Its source related to the core mechanism that allows us to capture crashes as they happen has been integrated directly into our SDK. KSCrash license is available at the top of all sources related to it.
• The overall size of the SDK has been reduced by 20% resulting in smaller binaries and reduced memory footprint.
• The SDK can now be integrated into Frameworks and static libraries through your preferred package manager.
• The SDK demo projects iosAppSwift and iosAppObjc have been renamed to Rollbar Demo and Rollbar ObjC Demo respectively, and moved into the Examples directory.
• New package manager integration examples have been added showing different methods of integrating the SDK into your applications and frameworks.
• Fixed Xcode 14.3 support when integrating the SDK using Cocoapods.
• Fixed an UTF-8 character encoding issue when retrieving persisted payloads that resulted in corrupt Unicode characters in messages, telemetry and others.
• Fixed a problem when dealing with unhandled status responses resulting in bad requests being sent repeatedly has been fixed.
• Fixed several warnings that would only show up when integrating with Cocoapods have been fixed.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Maintenance
• New release

Related issues

• Release task not being tracked.

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers assigned
• Issue from task tracker has a link to this pull request
• Changes have been reviewed by at least one other engineer