Drop support for Node 8

Author: pimterry

.travis.yml

@@ -6,7 +6,6 @@ node_js:
 - '14.6.0' # Bundled version
 - '12'
 - '10'
-- '8'
 before_install:
 - sudo apt-get install p7zip-full xterm
 install:

package.json

@@ -106,7 +106,7 @@
     "xhr2": "^0.2.0"
   },
   "engines": {
-    "node": ">=8.0.0"
+    "node": ">=10.0.0"
   },
   "keywords": [
     "http",