Add NodeJS 9 to CI matrix

Author: recrsn

.travis.yml

@@ -13,6 +13,7 @@ node_js:
   - "6"
   - "7"
   - "8"
+  - "9"
 
 addons:
   apt:
@@ -34,4 +35,4 @@ script: npm test
 
 after_success:
   - REGEX='^v(0|[1-9]+)\.(0|[1-9]+)\.(0|[1-9]+)$'
-  - if [[ $TRAVIS_TAG =~ $REGEX ]] || [[ $TRAVIS_COMMIT_MESSAGE == *"publish binary"* ]]; then echo "Publishing"; npm install node-pre-gyp-github; ./node_modules/.bin/node-pre-gyp configure; ./node_modules/.bin/node-pre-gyp build; ./node_modules/.bin/node-pre-gyp package; ./node_modules/.bin/node-pre-gyp-github publish --release; fi;
+  - if [[ $TRAVIS_TAG =~ $REGEX ]] || [[ $TRAVIS_COMMIT_MESSAGE == *"publish binary"* ]]; then echo "Publishing"; npm install node-pre-gyp-github; ./node_modules/.bin/node-pre-gyp configure; ./node_modules/.bin/node-pre-gyp build; ./node_modules/.bin/node-pre-gyp package; ./node_modules/.bin/node-pre-gyp-github publish --release; fi;

appveyor.yml

@@ -20,6 +20,10 @@ environment:
     platform: x64
   - nodejs_version: "8"
     platform: x86
+  - nodejs_version: "9"
+    platform: x64
+  - nodejs_version: "9"
+    platform: x86
 
 install:
   - where npm