Remove master branch version update.

[lina128]

This PR has following changes:

1. Remove master branch version update in release.ts script. Context: If we also have to update master branch every time releasing every package, 2 PRs need to be approved instead of 1, for each package. Also it runs tests redundantly, draining the CI resources too much. The version update in master is informational anyway, because the real version to be published will be in corresponding release branch. We will have other ways to provide version information, probably add a badge for npm version in readme.
2. Change package.json version field and version.ts to 0.0.0 for each package. Context: Instead of deleting the field and the version.ts file altogether, we decided to keep change minimal.

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This change is 

[nsthorat]

Reviewed 16 of 16 files at r1.
Reviewable status: complete! 1 of 1 approvals obtained (waiting on @dsmilkov and @nsthorat)