Update CI build configurations

The build configuration for Circle CI (1) have been updated to the new
API version 2.0 (2). Both Circle CI and Travis CI (3) are now also
testing against the latest NodeJS version.

References:

  (1) circleci.com
  (2) circleci.com/docs/2.0
  (3) travis-ci.org
  (4) npmjs.com
  (5) yarnpkg.com

GH-83

.circleci/config.yml

@@ -0,0 +1,26 @@
+# Copyright (c) 2017-present Arctic Ice Studio <development@arcticicestudio.com>
+# Copyright (c) 2017-present Sven Greb <development@svengreb.de>
+
+# Project:    Nord Visual Studio Code
+# Repository: https://github.com/arcticicestudio/nord-visual-studio-code
+# License:    MIT
+# References:
+#   https://circleci.com/docs/2.0
+#   https://circleci.com/docs/2.0/circleci-images/#nodejs
+
+version: 2
+jobs:
+  build:
+    docker:
+      - image: circleci/node:latest
+    steps:
+      - checkout
+      - run:
+          name: preprocess-clean-node-modules
+          command: rm -rf node_modules
+      - run:
+          name: preprocess-npm-install
+          command: npm install
+      - run:
+          name: lint
+          command: npm run lint

.npmrc

@@ -1 +1,2 @@
+package-lock=true
 save-exact=true

.travis.yml

@@ -1,19 +1,18 @@
 # Copyright (c) 2017-present Arctic Ice Studio <development@arcticicestudio.com>
-# Copyright (c) 2017-present Sven Greb <code@svengreb.de>
+# Copyright (c) 2017-present Sven Greb <development@svengreb.de>
 # 
 # Project:    Nord Visual Studio Code
 # Repository: https://github.com/arcticicestudio/nord-visual-studio-code
 # License:    MIT
 # References:
-#   https://docs.travis-ci.com
+#   https://docs.travis-ci.com/user/languages/javascript-with-nodejs
 
 language: node_js
 dist: trusty
 sudo: false
 node_js:
-  - "4"
-  - "6"
-  - "7"
+  - "8"
+  - "node"
 before_install:
   - rm -rf ./node_modules
 before_script: