feat: drop support for Node 8 and add Node 14 to the matrix

Node 8 is no longer maintained and we want to limit the number of
supported environments as it adds maintanance cost.

BREAKING CHANGE: 🧨 Dropped support for the Node 8

.github/workflows/main.yml

@@ -39,7 +39,7 @@ jobs:
     needs: build
     strategy:
       matrix:
-        node: [8, 10, 12]
+        node: [10, 12, 14]
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
     - uses: actions/checkout@v1
@@ -61,7 +61,7 @@ jobs:
           ${{ runner.os }}-node-${{ matrix.node }}-yarn-
       
     - name: Install dependencies
-      run: yarn install --frozen-lockfile --ignore-engines
+      run: yarn install --frozen-lockfile
 
     - name: Download build artifact
       uses: actions/download-artifact@v1

package.json

@@ -108,7 +108,7 @@
     "webpack": "^4.42.1"
   },
   "engines": {
-    "node": ">=8",
+    "node": ">=10",
     "yarn": ">=1.0.0"
   }
 }