Limited CI builds to Node LTS versions

Author: JamesMessinger

.travis.yml

@@ -8,8 +8,8 @@ language: node_js
 matrix:
   include:
     - node_js: 6
-    - node_js: 7
     - node_js: 8
+    - node_js: 10
 
 script:
   - npm test

appveyor.yml

@@ -4,8 +4,8 @@
 environment:
   matrix:
     - nodejs_version: "6"
-    - nodejs_version: "7"
     - nodejs_version: "8"
+    - nodejs_version: "10"
 
 skip_tags: true