Upgrade project to swift4.2

[kindraywind]

• Upgrade a lot of dependencies
• For the time being, use our own fork for markymark
• Convert project from Swift 4.1.2 to 4.2.0

closed #43

[codecov[bot]]

Codecov Report

Merging #44 into master will increase coverage by 41.3%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #44      +/-   ##
==========================================
+ Coverage   40.39%   81.69%   +41.3%     
==========================================
  Files          18       28      +10     
  Lines         656     1142     +486     
==========================================
+ Hits          265      933     +668     
+ Misses        391      209     -182

Impacted Files	Coverage Δ
...entsCalendar/Views/Cells/DetailTableViewCell.swift	96.42% <100%> (+96.42%)	:arrow_up:
...ar/ViewControllers/EventDetailViewController.swift	73.01% <100%> (+73.01%)	:arrow_up:
...EventsCalendar/Views/Cells/LinkTableViewCell.swift	93.33% <100%> (+93.33%)	:arrow_up:
...sCalendar/Utils/NSAttributedStringExtensions.swift	100% <100%> (ø)	:arrow_up:
ThaiTechEventsCalendar/AppDelegate.swift	51.61% <100%> (+3.12%)	:arrow_up:
ThaiTechEventsCalendar/Networks/CalendarAPI.swift	100% <0%> (ø)	:arrow_up:
...CalendarUITests/EventFeedViewControllerTests.swift	100% <0%> (ø)
...ntsCalendarTests/ThaiTechEventsCalendarTests.swift	100% <0%> (ø)
...endarTests/NSAttributedStringExtensionsTests.swift	100% <0%> (ø)
... and 18 more

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