Custom Cover UAT Low Priority Fixes Support (#2)

* fix: provide option to not select starting thumb cover frame

* fix: provide ability to set dimming view color

* fix: expose methods for clearing thumb selector cover and applying custom dimming color

* fix: provide ability to clear border color

* support setting thumbview preview width

* conditionally apply thumbnail logic

* conditionally apply constraints for tall vs landscape videos

* round corners to match latest designs

* remove unnecessary comment

* fix: support moving thumb selector to location based on tap

* fix: generate updated cover image preview after tap

* fix: start with recognizers disabled

* add comment

Merge pull request #1 from rewardStyle/CC-505-creators-can-view-video…

…-lengths-when-editing-in-storytelling-posts

Updated TrimmerViewDelegate Support

release version 4.0.2

update changelog

Merge pull request HHK1#45 from HHK1/swift5

update project for swift 5.0

archive for carthage

remove swift-version file

use correct info plist for framework

Merge pull request HHK1#10 from prynt/preparePodRelease

Bump version number

update version number and changelog