use @jakejarvis/eslint-config, switch to yarn

.github/workflows/publish.yml

@@ -15,7 +15,7 @@ jobs:
       with:
         node-version: 14
         registry-url: https://registry.npmjs.org/
-    - run: npm ci
-    - run: npm publish --access public
+    - run: yarn install --frozen-lockfile
+    - run: yarn publish
       env:
         NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/test.yml

@@ -28,11 +28,11 @@ jobs:
     - uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node }}
-    - name: npm install and test
+    - name: yarn install and test
       run: |
-        npm ci
-        npm audit
-        npm test
+        yarn install --frozen-lockfile
+        yarn audit
+        yarn test
     - name: Checkout gohugoio/hugoBasicExample
       uses: actions/checkout@master
       with: