Pin Node 14, try vertical-collection 3 (#921)

Node 14 should be a minumum supported version for the Ember Table 4
series. Additionally, try vertical-collection 3 which should bring support for
Ember 4.

.github/workflows/ci.yml

@@ -6,17 +6,17 @@ on:
 jobs:
   test:
     name: Run Tests
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     timeout-minutes: 6
 
     steps:
       - name: Checkout
         uses: actions/checkout@v2
 
-      - name: Use Node 12
+      - name: Use Node 14
         uses: actions/setup-node@v2-beta
         with:
-          node-version: 12.x
+          node-version: 14.x
 
       - name: Node Modules Cache
         uses: actions/cache@v2
@@ -37,7 +37,7 @@ jobs:
 
   test-ember-try:
     name: Run Tests
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     timeout-minutes: 6
 
     strategy:
@@ -61,10 +61,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
-      - name: Use Node 12
+      - name: Use Node 14
         uses: actions/setup-node@v2-beta
         with:
-          node-version: 12.x
+          node-version: 14.x
 
       - name: Node Modules Cache
         uses: actions/cache@v2

package.json

@@ -32,7 +32,7 @@
     "@babel/plugin-proposal-object-rest-spread": "^7.12.13",
     "@babel/plugin-proposal-optional-catch-binding": "^7.12.13",
     "@babel/plugin-proposal-optional-chaining": "^7.12.13",
-    "@html-next/vertical-collection": "^2.0.0",
+    "@html-next/vertical-collection": "3.0.0-0",
     "broccoli-string-replace": "^0.1.2",
     "css-element-queries": "^0.4.0",
     "ember-classy-page-object": "^0.7.0",
@@ -92,7 +92,7 @@
     "sass": "^1.26.10"
   },
   "engines": {
-    "node": ">= 10.*"
+    "node": ">= 14.*"
   },
   "ember-addon": {
     "configPath": "tests/dummy/config"
@@ -102,7 +102,7 @@
     "prettier": "1.18.2"
   },
   "volta": {
-    "node": "12.22.3",
-    "yarn": "1.22.10"
+    "node": "14.18.2",
+    "yarn": "1.22.17"
   }
 }