Add support for Node.js v16 (#47)

Author: rodion-arr

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [10.x, 12.x, 14.x]
+        node-version: [10.x, 12.x, 14.x, 16.x]
         os: [ubuntu-latest, windows-latest]
 
     steps:

package.json

@@ -48,6 +48,6 @@
     "mocha": "^6.2.0"
   },
   "engines": {
-    "node": "^14 || ^13 || ^12 || ^11 || ^10.19"
+    "node": "^16 || ^14 || ^13 || ^12 || ^11 || ^10.19"
   }
 }