Require Node 14 for development and CI as it's current LTS

Author: adamkudrna

.github/workflows/release-management.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: 14
 
       - name: Cache node modules
         uses: actions/cache@v2
@@ -100,7 +100,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: 14
           registry-url: https://registry.npmjs.org/
 
       - name: Cache node modules

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
-        node-version: [ 12 ]
+        node-version: [ 14, 15 ]
     steps:
       - name: Clone repository
         uses: actions/checkout@v2

package.json

@@ -29,8 +29,8 @@
     "url": "https://github.com/react-ui-org/react-ui"
   },
   "engines": {
-    "node": ">=12.16.3",
-    "npm": ">=6.14.4"
+    "node": ">=14.15.1",
+    "npm": ">=6.14.8"
   },
   "dependencies": {
     "docz": "^2.3.1",