Update package.json to node v18

Includes updating engines, bumping incompatible packages, adding .nvmrc file and bumping version in ci workflow

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
             - name: Install nodejs
               uses: actions/setup-node@v1
               with:
-                node-version: "16.x"
+                node-version: "18.x"
 
             - name: Install node dependencies
               run: npm ci

.nvmrc

@@ -0,0 +1 @@
+v18.16.1

package.json

@@ -5,7 +5,7 @@
   "main": "index.js",
   "repository": "github:defra/flood-app",
   "engines": {
-    "node": ">=16"
+    "node": ">=18"
   },
   "browserslist": [
     "IE 11"
@@ -41,7 +41,7 @@
     "@hapi/hoek": "^9.2.1",
     "@hapi/inert": "^6.0.4",
     "@hapi/joi": "^17.1.1",
-    "@hapi/lab": "^24.4.0",
+    "@hapi/lab": "^25.1.3",
     "@hapi/vision": "^6.1.0",
     "@hapi/wreck": "^17.1.0",
     "@hapi/yar": "^10.1.1",
@@ -55,7 +55,7 @@
     "d3": "^7.2.0",
     "datatables.net-buttons": "^2.1.1",
     "datatables.net-buttons-dt": "^2.1.1",
-    "datatables.net-dt": "^1.11.3",
+    "datatables.net-dt": "1.12.1",
     "elm-pep": "^1.0.6",
     "geojson": "0.5.0",
     "govuk-frontend": "^3.14.0",