Merge branch 'master' into develop

.swift-version

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

.travis.yml

@@ -4,7 +4,7 @@ os:
 language: generic
 sudo: required
 dist: trusty
-osx_image: xcode9
+osx_image: xcode10
 install:
     - eval "$(curl -sL https://gist.githubusercontent.com/kylef/5c0475ff02b7c7671d2a/raw/9f442512a46d7a2af7b850d65a7e9bd31edfb09b/swiftenv-install.sh)"
 script:

CHANGELOG

@@ -1,3 +1,6 @@
+0.12.0
+- Swift 4.2 maintenance update.
+
 0.11.0
 - API: Cryptor.seek() is throwable
 - Adds proper stream support for CTR encryption with Updaptable interface.