💚 Fixing Travis CI Build.

Author: kayo5994

.travis.yml

@@ -1,9 +1,11 @@
 language: node_js
+install:
+  - yarn
 cache:
   directories:
     - node_modules
 node_js:
-  - "8.10.0"
+  - "10.15.1"
   - "stable"
 before_install:
   - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.15.2

appveyor.yml

@@ -8,7 +8,7 @@ clone_depth: 10
 
 # Test against the latest version of this Node.js version
 environment:
-  nodejs_version: "8"
+  nodejs_version: "10"
 
 # Install scripts. (runs after repo cloning)
 install: