Use npm ci instead of npm i for CI.

[taeold]

Unsure why, but our Github Actions started failing w/ following error message:

Run npm install
npm WARN read-shrinkwrap This version of npm is compatible with lockfileVersion@1, but package-lock.json was generated for lockfileVersion@2. I'll try to do my best with it!
npm ERR! cb() never called!

npm ERR! This is an error with npm itself. Please report this error at:
npm ERR!     <https://npm.community/>

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/runner/.npm/_logs/2022-03-23T21_54_22_030Z-debug.log
Error: Process completed with exit code 1.

We fix this error by replacing npm ci in place of npm i. It turned out that our package.json and package-lock.json were out of sync, so we update package-lock.json here too.