updates for Xcode 10.2 (LoopKit#910)

* updates for Xcode 10.2

* Use swift charts 0.6.3 with xcode 10.2 patch

* bump version for hotfix

Merge pull request LoopKit#868 from LoopKit/dev

Release 1.9.4

Fix issue report crash, and track pump frequency. (LoopKit#821)

Merge pull request LoopKit#810 from LoopKit/xcode10

Hotfix: Build on Xcode 10

Merge pull request LoopKit#796 from LoopKit/dev

Release 1.9.1

Merge pull request LoopKit#789 from LoopKit/dev

Release 1.9

Merge pull request LoopKit#739 from LoopKit/dev

Release 1.5.6

Merge pull request LoopKit#719 from LoopKit/dev

Release 1.5.4

 Hotfix: Update to LoopKit 1.5.4 (LoopKit#664)

* Updating to LoopKit 1.5.4

* bump version

Merge pull request LoopKit#650 from LoopKit/dev

Release 1.5.1