Fix Swift 3.1 compatibility

mapbox / MapboxStatic.swift

Static map snapshots with overlays in Swift or Objective-C on iOS, macOS, tvOS, and watchOS

https://www.mapbox.com/api-documentation/?language=Swift#static

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Fix Swift 3.1 compatibility #55

Closed 1ec5 closed 7 years ago

1ec5 commented 7 years ago

Resolved some Swift 3.1 compiler warnings in unit test code. Some optionals should’ve been force-unwrapped because they’d only be used if the optional turned out to be nil.

Also updated dependencies.

/cc @bsudekum