Test on io.js 3.1.0

.travis.yml

+sudo: false
 language: cpp
+addons:
+  apt:
+    sources:
+    - ubuntu-toolchain-r-test
+    packages:
+    - g++-4.8
 
 # http://docs.travis-ci.com/user/multi-os/
 os:
@@ -17,6 +24,7 @@ env:
    - NODE_VERSION="0.12.7" # ABI 14
    - NODE_VERSION="iojs-1.8.4" # ABI 43
    - NODE_VERSION="iojs-2.3.4" # ABI 44
+   - NODE_VERSION="iojs-3.1.0" # ABI 45
    - NODE_WEBKIT="0.8.6" TARGET_ARCH="ia32"
    - NODE_WEBKIT="0.8.6" TARGET_ARCH="x64"
    - NODE_WEBKIT="0.10.5" TARGET_ARCH="ia32"
@@ -31,6 +39,7 @@ matrix:
       os: osx
 
 before_install:
+- if [[ $TRAVIS_OS_NAME == "linux" ]]; then export CXX=g++-4.8; fi
 # check if tag exists and matches package.json
 - scripts/validate_tag.sh
 - echo $NODE_VERSION

appveyor.yml

@@ -28,6 +28,12 @@ environment:
     - nodejs_version: 2.0.0
       platform: x86
       msvs_toolset: 12
+    - nodejs_version: 3.1.0
+      platform: x64
+      msvs_toolset: 12
+    - nodejs_version: 3.1.0
+      platform: x86
+      msvs_toolset: 12
     # custom visual studio 2015 builds
     - nodejs_version: 0.10.40
       platform: x86