chore: optimize building repository

[AllanZhengYP]

• Switching over to yarn workspace to optimize the repo's bootstrap performance. The full repo bootstrap time is reduced to ~70 seconds.
• The test scripts now only compile and test the packages that:
  • changed from the last tag
  • have direct or indirect dependency over changed packages
  • have direct or inderect dependents that are changed packages
• Add a 'test-all' script to compile/test all the packages

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[AllanZhengYP]

This is ready to be reviewed. I'm still using npm run script because yarn run script currently doesn't seem to conform pre and post script hook. I will look into this later. Now the scripts all work fine with npm command.

[trivikr]

Let.s use yarn for everything as follows:

• Replace npm run with yarn in all package.json files
• Replace npm commands with yarn in CONTRIBUTING.md and .travis.yml:
  • replace npm install with yarn
  • remove npm run bootstrap (as yarn now does bootstrapping)
  • replace npm test with yarn test
• Remove yarn.lock from .gitignore so that we commit lock files and lock our dependencies

[AllanZhengYP]

@trivikr
Updated all the scripts to use yarn already #327
Some generated clients still have local npm scripts. Will update them in another PR.

[trivikr]

I ran the following commands on 2473c5b in addition to removing yarn.lock from .gitignore on m4.2xlarge:

yarn --version: 1.17.3

• git clean -dfx
• yarn: 44.43s (yarn.log)
• yarn test: 1230.97s (yarn-test.log)

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs and link to relevant comments in this thread.