Bundle Update on 2016-09-13

[deppbot]

Updated RubyGems:

• Added: codecov, 0.1.5
• Added: docile, 1.1.5
• Added: json, 2.0.2
• Added: simplecov, 0.12.0
• Added: simplecov-html, 0.10.0
• Added: url, 0.3.2

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