chore: drop node 6 and 8 support (#47)

diff --git a/.travis.yml b/.travis.yml
index a02d66a..5bff8c1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,6 @@
 language: node_js
 sudo: false
 node_js:
-  - 6
-  - 8
   - 10
   - 12
 
diff --git a/appveyor.yml b/appveyor.yml
index 4752c73..dc43cac 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,8 +3,6 @@
 
 environment:
   matrix:
-  - nodejs_version: 6
-  - nodejs_version: 8
   - nodejs_version: 10
   - nodejs_version: 12
 
diff --git a/package.json b/package.json
index 599e0ad..76d9ab0 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "email": "dev@cordova.apache.org"
   },
   "engines": {
-    "node": ">=6"
+    "node": ">=10"
   },
   "dependencies": {
     "cordova-app-hello-world": "^4.0.0",