update node requirements to node v14

- fixes #7473

.circleci/config.yml

@@ -28,7 +28,7 @@ jobs:
 
   frontend:
     docker:
-      - image: circleci/node:10
+      - image: circleci/node:14
     steps:
       - checkout
       - restore_cache:
@@ -53,8 +53,8 @@ jobs:
       - image: circleci/python:3.7.3
     steps:
       - checkout
-      - run: cd ~ && wget https://nodejs.org/dist/v10.23.1/node-v10.23.1-linux-x64.tar.gz
-      - run: cd /usr/local/ && sudo tar --strip-components 1 -xzf ~/node-v10.23.1-linux-x64.tar.gz
+      - run: cd ~ && wget https://nodejs.org/dist/v14.17.5/node-v14.17.5-linux-x64.tar.gz
+      - run: cd /usr/local/ && sudo tar --strip-components 1 -xzf ~/node-v14.17.5-linux-x64.tar.gz
       - run: pip install --user wheel boto3
       - run: npm install
       - run: npm run dist

.nvmrc

@@ -1 +1 @@
-10
+14

package.json

@@ -4,7 +4,7 @@
   "repository": "https://github.com/wagtail/wagtail",
   "private": true,
   "engines": {
-    "node": ">=10.0.0"
+    "node": ">=14.0.0"
   },
   "browserslist": [
     "Firefox ESR",