Bump Xcode to 8.2 and set SWIFT_VERSION to 3.0

[sushichop]

New Pull Request Checklist

• I have read and understood the CONTRIBUTING guide

• I have read the Documentation

• I have searched for a similar pull request in the project and found none

• I have updated this branch with the latest master to avoid conflicts (via merge from master or rebase)

• I have added the required tests to prove the fix/feature I am adding

• I have updated the documentation (if necesarry)

• I have run the tests and they pass

• I have run the lint and it passes (pod lib lint)

This merge request reffers to the following issues: #848

Pull Request Description

• I bumped Xcode to 8.2 and set SWIFT_VERSION to 3.0.
• I set iPad Pro (9.7 inch) instead of iPhone 6 as a simulator name because of the workaround for Travis CI with Xcode 8.2. See xcode8.2: Duplicate simulators for iOS 10.2 travis-ci/travis-ci#7031 for detail.

Note
Unfortunately you had to set SWIFT_VERSION to 3.0.1 with Xcode 8.1 because of the bug with Xcode.
Now you can set SWIFT_VERSION to 3.0 again with Xcode 8.2 or later and 3.0 is definitely desired value.

[codecov-io]

Codecov Report

Merging #853 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #853   +/-   ##
=======================================
  Coverage   22.86%   22.86%           
=======================================
  Files          16       16           
  Lines        3902     3902           
  Branches      279      279           
=======================================
  Hits          892      892           
  Misses       3008     3008           
  Partials        2        2

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