🔥 Dropped support for Node 10

refs https://github.com/TryGhost/Team/issues/658

- Node 10 become EOL as of April 30th so it's time to drop support
- this commit:
  - removes the Node 10 range from the `node` `engines` block
  - removes Node 10 from CI tests
  - switches Node 10 in the CLI test to Node 12 so we can ensure it
    installs on our oldest supported Node version

.github/workflows/test.yml

@@ -75,7 +75,7 @@ jobs:
     if: github.event_name == 'push' || (github.event_name == 'pull_request' && !startsWith(github.head_ref, 'renovate/'))
     strategy:
       matrix:
-        node: [ '10.13.0', '12.10.0', '14.15.0' ]
+        node: [ '12.10.0', '14.15.0' ]
         env:
           - DB: sqlite3
             NODE_ENV: testing
@@ -130,7 +130,7 @@ jobs:
           submodules: true
       - uses: actions/setup-node@v2
         with:
-          node-version: '10.13.0'
+          node-version: '12.10.0'
       - run: npm install -g ghost-cli@latest
       - run: npm --no-git-tag-version version minor # We need to artificially bump the minor version to get migrations to run
 

package.json

@@ -36,7 +36,7 @@
     "fixmodulenotdefined": "yarn cache clean && cd core/client && rm -rf node_modules tmp dist && yarn && cd ../../"
   },
   "engines": {
-    "node": "^10.13.0 || ^12.10.0 || ^14.15.0",
+    "node": "^12.10.0 || ^14.15.0",
     "cli": "^1.16.0"
   },
   "dependencies": {