Enhance CI script

[yujonglee]

Description

1. Use yarn install --frozen-lockfile instead of yarn. It looks bit slower(just my feeling), but recommended for CI. It is similar to npm ci.

Screenshot from yarn

2. Cache node and cache file of yarn to make process faster.
3. Replace yarn test:all with yarn test because process is duplicated with previous one such as lerna run build.

Test Plan

none.

Related Issues

none.

Tests

none.

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• Run yarn test:all and make sure nothing fails. You can run yarn test -u to update snapshots if needed.
• I am willing to follow-up on review comments in a timely manner.

[codecov]

Codecov Report

Merging #132 (f4704de) into master (9e2746d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #132   +/-   ##
=======================================
  Coverage   95.44%   95.44%           
=======================================
  Files          27       27           
  Lines         636      636           
  Branches      280      280           
=======================================
  Hits          607      607           
  Misses         28       28           
  Partials        1        1           

[hyochan]

LGTM!!