fix appveyor / test on node v8 on travis

Author: Dane Springmeyer

.travis.yml

@@ -22,6 +22,7 @@ env:
    - NODE_VERSION="5"
    - NODE_VERSION="6"
    - NODE_VERSION="7"
+   - NODE_VERSION="8"
 
 before_install:
 - if [[ $(uname -s) == 'Linux' ]]; then

appveyor.yml

@@ -28,7 +28,8 @@ install:
   # for node v6 this dodges npm 3.10.10 bug whereby --nodedir/--dist-url is not passed to node-gyp (https://github.com/mapbox/node-pre-gyp/issues/300)
   # for all node x86 versions this dodges a mysterious ELIFECYCLE error: https://ci.appveyor.com/project/Mapbox/node-pre-gyp/build/1.0.582/job/b8q2nud6vkj0s6qo#L233
   # for node v8 this dodges https://github.com/mapbox/node-pre-gyp/issues/302
-  - npm install npm@2.x -g  - node --version
+  - npm install npm@2.x -g
+  - node --version
   - npm --version
   - node -e "console.log(process.arch);"
   - IF /I "%PLATFORM%" == "x64" set PATH=C:\Python27-x64;%PATH%