Allow npm publish to use tsc (#261)

See https://circleci.com/gh/googleapis/nodejs-firestore/7128

Author: schmidt-sebastian

.circleci/config.yml

@@ -131,4 +131,5 @@ jobs:
     steps:
       - checkout
       - run: echo "//registry.npmjs.org/:_authToken=${NPM_TOKEN}" > ~/.npmrc
+      - run: *npm_install_and_link
       - run: npm publish