Updated build config files.

Author: neogeek

.travis.yml

@@ -1,11 +1,11 @@
 language: node_js
 node_js:
   - "4"
-  - "5"
   - "6"
   - "7"
+  - "8"
 before_install:
-  - if [[ `npm -v` != 3* ]]; then npm i -g npm@3; fi
+  - if [[ `npm -v` != 5* ]]; then npm i -g npm@latest; fi
 after_success:
   - npm run coverage
   - npm run test:flags

appveyor.yml

@@ -1,13 +1,13 @@
 environment:
   matrix:
   - nodejs_version: "4"
-  - nodejs_version: "5"
   - nodejs_version: "6"
-  - nodejs_version: "7"
+  - nodejs_version: "8"
+  - nodejs_version: "9"
 
 install:
   - ps: Install-Product node $env:nodejs_version
-  - npm i -g npm@3
+  - npm i -g npm@latest
   - npm install
 
 test_script: