Update CI configuration (#144)

* Update CI configuration

- Drop Node 10 from the matrix.
  - Already End-of-Life. See <https://github.com/nodejs/Release#end-of-life-releases>
- Add Node 16 to the matrix.
- Bump actions/setup-node from v1 to v2
  - Set `cache: npm` for speed-up
  - See <https://github.com/actions/setup-node#usage>

* Remove useless OS matrix

* Use LTS for Lint removing matrix

Co-authored-by: Richard Hallows <jeddy3@users.noreply.github.com>

.github/workflows/nodejs.yml

@@ -14,22 +14,19 @@ env:
 
 jobs:
   lint:
-    name: Lint on Node.js ${{ matrix.node }} and ${{ matrix.os }}
+    name: Lint
 
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
-        node: [12]
-        os: [ubuntu-latest]
 
     steps:
       - uses: actions/checkout@v2
 
       - name: Use Node.js ${{ matrix.node }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
-          node-version: ${{ matrix.node }}
+          node-version: "lts/*"
+          cache: npm
 
       - name: Install latest npm
         run: npm install --global npm@latest
@@ -48,15 +45,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [10, 12, 14]
+        node: [12, 14, 16]
 
     steps:
       - uses: actions/checkout@v2
 
       - name: Use Node.js ${{ matrix.node }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node }}
+          cache: npm
 
       - name: Install latest npm
         run: npm install --global npm@latest