Add support for node 14 (modelled after #1153)

Author: icarito

.travis.yml

@@ -1,7 +1,7 @@
 language: node_js
 node_js:
   - 8
-  - 13.5.0
+  - 14.4.0
 before_script:
   - npm dedupe
 sudo: false

appveyor.yml

@@ -2,7 +2,7 @@
 environment:
   matrix:
   # node.js
-  - nodejs_version: "13.5.0"
+  - nodejs_version: "14.4.0"
 
 # Install scripts. (runs after repo cloning)
 install:

package.json

@@ -105,7 +105,7 @@
     "test:exports-worker": "node test/exports_worker/exports.js && testee test/exports_worker/worker.html --browsers chrome --reporter Spec"
   },
   "engines": {
-    "node": "8.x - 13.x"
+    "node": "8.x - 14.x"
   },
   "system": {
     "npmDependencies": [