Merge pull request #69 from ember-template-lint/drop-node8

Drop support for NodeJs 8 & 11

Author: dcyriller

.travis.yml

@@ -1,7 +1,7 @@
 ---
 language: node_js
 node_js:
-  - "8"
+  - "10"
 
 branches:
   only:

package.json

@@ -40,7 +40,7 @@
     "prettier": "^1.19.0"
   },
   "engines": {
-    "node": "8.* || >= 10.*"
+    "node": "10.* || >= 12.*"
   },
   "dependencies": {
     "prettier-linter-helpers": "^1.0.0"