Update npm modules and drop support for Node.js 10 (#196)

Following packages have been updated:

* eslint
* eslint-config-wikimedia
* mocha

.github/workflows/node.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-v: [10.x, 12.x, 14.x, 16.x]
+        node-v: [12.x, 14.x, 16.x]
     steps:
       - name: Checkout
         uses: actions/checkout@v2

package.json

@@ -23,9 +23,9 @@
   "main": "src/index.js",
   "devDependencies": {
     "assert": "2.0.0",
-    "eslint": "^7.32.0",
-    "eslint-config-wikimedia": "0.20.0",
-    "mocha": "9.1.3"
+    "eslint": "8.7.0",
+    "eslint-config-wikimedia": "0.21.0",
+    "mocha": "9.1.4"
   },
   "repository": {
     "type": "git",
@@ -35,7 +35,7 @@
     "url": "http://github.com/wikimedia/language-data/issues"
   },
   "engine": {
-    "node": ">=10.0.0"
+    "node": ">=12.0.0"
   },
   "license": "GPL-2.0-or-later",
   "scripts": {