Updated version to 1.1.2. Updated LayerKit dependency to 0.26.9

Updated version to 1.1.1. Updated LayerKit dependency to 0.26.5

Merge pull request #1374 from layerhq/feature/APPS-2740_Presence

APPS-2740 - Presence Feature

Updated version to 1.0.33

Updated podspec URLs

Update CHANGELOG.md

Updated version to 1.0.30

Updated version to 1.0.29

Updated files and changelog for new version 1.0.28

Updating version to 1.0.27