Update dependency jazzy to v0.15.3

Gemfile

 source "https://rubygems.org"
 
 gem "cocoapods", "1.15.2"
-gem "jazzy", "0.14.3"
+gem "jazzy", "0.15.3"
 gem "xcpretty", "0.3.0"
 gem "fastlane", "2.222.0"
 gem "xcode-install", "2.8.1"