CVCalendar Demo Crash in presentedDateUpdated() when unwrapping optional

[rlaferla]

• I have verified there are no duplicate active or recent bugs, questions, or requests
• I have verified that I am using the latest version of CVCalendar.
• I have given my issue a non-generic title.

Expected Behavior

No crash

N/A

Current Behavior

Crash

fatal error: unexpectedly found nil while unwrapping an Optional value

Possible Solution

Unwrapped optional that was nil. monthLabel outlet was nil.

Steps to Reproduce (for bugs)

1. Download latest source.
2. Run demo.
3. Crash.

Context

Your Environment

• Version used (Cocoapods spec):
• Device used i.e. iPhone 6S:

XCode 8.1 simulator

• Physical device (y/n): n
• Link to your project (if available):

N/A