Ready to be 4.0.0 (#42)

* Support Swift 5 (#41)

* Update .gitignore

* Update CocoaPods

* Migrate to Swift5

* Update README.md

* Make CircleCI happy by migrating to Swift 4.2.1

* Try to fix the error from "pod spec lint"

Related: CocoaPods/fourflusher#15

* Fix swift_version (#40)

* Ready to be v4.0.0

.circleci/config.yml

@@ -2,7 +2,8 @@ version: 2
 jobs:
   build:
     docker:
-      - image: library/swift:4.1
+      # TODO: Use library/swift:5.0 if available
+      - image: library/swift:4.2.1
     steps:
       - checkout
       - run:

.gitignore

@@ -1,6 +1,8 @@
+
 MirrorDiffKit.framework.zip
 
 # Created by https://www.gitignore.io/api/swift
+# Edit at https://www.gitignore.io/?templates=swift
 
 ### Swift ###
 # Xcode
@@ -42,11 +44,26 @@ playground.xcworkspace
 # Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
 # Packages/
 # Package.pins
+# Package.resolved
 .build/
 
-# CocoaPods - Refactored to standalone file
+# CocoaPods
+#
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
+#
+# Pods/
+#
+# Add this line if you want to avoid checking in source code from the Xcode workspace
+# *.xcworkspace
+
+# Carthage
+#
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+# Carthage/Checkouts
 
-# Carthage - Refactored to standalone file
+Carthage/Build
 
 # fastlane
 #
@@ -57,24 +74,120 @@ playground.xcworkspace
 
 fastlane/report.xml
 fastlane/Preview.html
-fastlane/screenshots
+fastlane/screenshots/**/*.png
 fastlane/test_output
 
+# Code Injection
+#
+# After new code Injection tools there's a generated folder /iOSInjectionProject
+# https://github.com/johnno1962/injectionforxcode
+
+iOSInjectionProject/
 
 # End of https://www.gitignore.io/api/swift
 
+# Created by https://www.gitignore.io/api/carthage
+# Edit at https://www.gitignore.io/?templates=carthage
+
+### Carthage ###
+# Carthage
+#
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+# Carthage/Checkouts
+
+Carthage/Build
+
+# End of https://www.gitignore.io/api/carthage
+
+# Created by https://www.gitignore.io/api/cocoapods
+# Edit at https://www.gitignore.io/?templates=cocoapods
+
+### CocoaPods ###
+## CocoaPods GitIgnore Template
+
+# CocoaPods - Only use to conserve bandwidth / Save time on Pushing
+#           - Also handy if you have a large number of dependant pods
+#           - AS PER https://guides.cocoapods.org/using/using-cocoapods.html NEVER IGNORE THE LOCK FILE
+Pods/
+
+# End of https://www.gitignore.io/api/cocoapods
+
+# Created by https://www.gitignore.io/api/ruby
+# Edit at https://www.gitignore.io/?templates=ruby
+
+### Ruby ###
+*.gem
+*.rbc
+/.config
+/coverage/
+/InstalledFiles
+/pkg/
+/spec/reports/
+/spec/examples.txt
+/test/tmp/
+/test/version_tmp/
+/tmp/
+
+# Used by dotenv library to load environment variables.
+# .env
+
+## Specific to RubyMotion:
+.dat*
+.repl_history
+build/
+*.bridgesupport
+build-iPhoneOS/
+build-iPhoneSimulator/
+
+## Specific to RubyMotion (use of CocoaPods):
+#
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
+#
+# vendor/Pods/
+
+## Documentation cache and generated files:
+/.yardoc/
+/_yardoc/
+/doc/
+/rdoc/
+
+## Environment normalization:
+/.bundle/
+/vendor/bundle
+/lib/bundler/man/
+
+# for a library or gem, you might want to ignore these files since the code is
+# intended to run in multiple environments; otherwise, check them in:
+# Gemfile.lock
+# .ruby-version
+# .ruby-gemset
+
+# unless supporting rvm < 1.11.0 or doing something fancy, ignore this:
+.rvmrc
+
+# End of https://www.gitignore.io/api/ruby
+
 # Created by https://www.gitignore.io/api/xcode
+# Edit at https://www.gitignore.io/?templates=xcode
 
 ### Xcode ###
 # Xcode
 #
 # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
 
-## Build generated
+## User settings
+xcuserdata/
+
+## compatibility with Xcode 8 and earlier (ignoring not required starting Xcode 9)
+*.xcscmblueprint
+*.xccheckout
+
+## compatibility with Xcode 3 and earlier (ignoring not required starting Xcode 4)
 build/
 DerivedData/
-
-## Various settings
+*.moved-aside
 *.pbxuser
 !default.pbxuser
 *.mode1v3
@@ -83,60 +196,66 @@ DerivedData/
 !default.mode2v3
 *.perspectivev3
 !default.perspectivev3
-xcuserdata/
-
-## Other
-*.moved-aside
-*.xccheckout
-*.xcscmblueprint
 
 ### Xcode Patch ###
 *.xcodeproj/*
 !*.xcodeproj/project.pbxproj
 !*.xcodeproj/xcshareddata/
 !*.xcworkspace/contents.xcworkspacedata
 /*.gcno
-
+**/xcshareddata/WorkspaceSettings.xcsettings
 
 # End of https://www.gitignore.io/api/xcode
 
 # Created by https://www.gitignore.io/api/appcode
+# Edit at https://www.gitignore.io/?templates=appcode
 
 ### AppCode ###
-# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm
 # Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
 
-# User-specific stuff:
+# User-specific stuff
 .idea/**/workspace.xml
 .idea/**/tasks.xml
-.idea/dictionaries
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# Generated files
+.idea/**/contentModel.xml
 
-# Sensitive or high-churn files:
+# Sensitive or high-churn files
 .idea/**/dataSources/
 .idea/**/dataSources.ids
-.idea/**/dataSources.xml
 .idea/**/dataSources.local.xml
 .idea/**/sqlDataSources.xml
 .idea/**/dynamic.xml
 .idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
 
-# Gradle:
+# Gradle
 .idea/**/gradle.xml
 .idea/**/libraries
 
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+
 # CMake
-cmake-build-debug/
+cmake-build-*/
 
-# Mongo Explorer plugin:
+# Mongo Explorer plugin
 .idea/**/mongoSettings.xml
 
-## File-based project format:
+# File-based project format
 *.iws
 
-## Plugin-specific files:
-
 # IntelliJ
-/out/
+out/
 
 # mpeltonen/sbt-idea plugin
 .idea_modules/
@@ -147,15 +266,18 @@ atlassian-ide-plugin.xml
 # Cursive Clojure plugin
 .idea/replstate.xml
 
-# Ruby plugin and RubyMine
-/.rakeTasks
-
 # Crashlytics plugin (for Android Studio and IntelliJ)
 com_crashlytics_export_strings.xml
 crashlytics.properties
 crashlytics-build.properties
 fabric.properties
 
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
 ### AppCode Patch ###
 # Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
 
@@ -167,31 +289,4 @@ fabric.properties
 # Sonarlint plugin
 .idea/sonarlint
 
-
 # End of https://www.gitignore.io/api/appcode
-
-# Created by https://www.gitignore.io/api/carthage
-
-### Carthage ###
-# Carthage
-#
-# Add this line if you want to avoid checking in source code from Carthage dependencies.
-# Carthage/Checkouts
-
-Carthage/Build
-
-
-# End of https://www.gitignore.io/api/carthage
-
-# Created by https://www.gitignore.io/api/cocoapods
-
-### CocoaPods ###
-## CocoaPods GitIgnore Template
-
-# CocoaPods - Only use to conserve bandwidth / Save time on Pushing
-#           - Also handy if you have a large number of dependant pods
-#           - AS PER https://guides.cocoapods.org/using/using-cocoapods.html NEVER IGNORE THE LOCK FILE
-Pods/
-
-
-# End of https://www.gitignore.io/api/cocoapods

.swift-version

@@ -1 +1 @@
-4.1
+4.2

Gemfile

@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 source "https://rubygems.org"
 
-gem "cocoapods", "~> 1.2.0"
+gem "cocoapods", "~> 1.6.0.rc.2"