cache node_modules in github actions

.github/workflows/transpile.yml

@@ -17,8 +17,8 @@ jobs:
           node-version: 10.x
       - uses: actions/cache@v2
         with:
-          path: ~/.npm
-          key: npm-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: npm-
+          path: '**/node_modules'
+          key: npm-v2-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: npm-v2-
       - run: npm ci
       - run: bash scripts/transpile-push.sh