chore: Add support for Node 8

.travis.yml

@@ -12,18 +12,20 @@ before_install:
   # Travis CI has only shallow clone of the repository. We need to get the 'master' branch
   # so 'conventional-changelog-lint' could compare commits and lint them: marionebl/conventional-changelog-lint#7
   - "git remote set-branches origin master && git fetch && git checkout master && git checkout -"
-  - "npm -g install npm@4"
+  - "npm -g install npm@5"
 install: "npm install --no-optional"
 jobs:
   include:
     - stage: "code/docs/commits quality checks"
-      node_js: "6"
+      node_js: "8"
       script: "npm run lint"
     - stage: "tests & code coverage"
       node_js: "4"
       script: "npm run test:coverage && npm run coveralls"
     - node_js: "6"
       script: "npm run test:coverage && npm run coveralls"
+    - node_js: "8"
+      script: "npm run test:coverage && npm run coveralls"
     - stage: "semantic release"
-      node_js: "6"
+      node_js: "8"
       script: " npm run semantic-release || true"

appveyor.yml

@@ -1,8 +1,8 @@
 environment:
-  nodejs_version: "6"
+  nodejs_version: "8"
 install:
-  - ps: Install-Product node 6
-  - "npm -g install npm@latest"
+  - ps: Install-Product node 8
+  - "npm -g install npm@5"
   - "set PATH=%APPDATA%\\npm;%PATH%"
   - "npm install --no-optional"
 cache:

docs/install-node.sh

@@ -11,8 +11,8 @@ if [ "$READTHEDOCS" = 'True' ]; then
     fi
     . ~/.nvm/nvm.sh
 
-    nvm install 6
-    nvm use 6
+    nvm install 8
+    nvm use 8
 
     npm install --no-optional
 

provisioning.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 sudo apt-get install -y mc curl git-core build-essential
 sudo su vagrant -c 'curl -L https://raw.github.com/creationix/nvm/master/install.sh | sh'
-sudo su vagrant -c '. ~vagrant/.nvm/nvm.sh; nvm install v6'
-sudo su vagrant -c '. ~vagrant/.nvm/nvm.sh;nvm use v6'
-sudo su vagrant -c '. ~vagrant/.nvm/nvm.sh;nvm alias default v6'
+sudo su vagrant -c '. ~vagrant/.nvm/nvm.sh; nvm install v8'
+sudo su vagrant -c '. ~vagrant/.nvm/nvm.sh;nvm use v8'
+sudo su vagrant -c '. ~vagrant/.nvm/nvm.sh;nvm alias default v8'