Fix bugs in release and publish scripts.

[lina128]

Tried the new release scripts, this PR fixes below issues:

1. Change from yarn publish to yarn publish-npm. Context: yarn publish does not work, it throws error: "Can't answer a question unless a user TTY", same issue is discussed in [lerna publish] Can't answer a question unless a user TTY lerna/lerna#1200. The reason is because yarn publish has an interactive cli, which makes it impossible to use for automation process. Tried the yarn --non-interactive publish method discussed in the thread, doesn't work either. So change to yarn publish-npm, tested locally using npm whoami as a substitute. Yarn 2.x has yarn npm publish natively. So once we upgrade to yarn 2.x, we don't need to have publish-npm: "npm publish" in each package.json.

2. Combined tag version steps. Context: This script is called from the publish-npm.ts. It didn't throw any errors. But actually, only the first step that creates the tag succeed, the second step that pushes the tag didn't get executed. Combining the two steps works. It is something related to child processes.

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This change is 

[dsmilkov]

Reviewed 9 of 9 files at r1.
Reviewable status: complete! 1 of 1 approvals obtained (waiting on @dsmilkov, @lina128, @nsthorat, and @pyu10055)

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scripts/publish-npm.ts, line 128 at r1 (raw file):

    console.log(chalk.magenta.bold(`~~~ Publishing ${pkg} to npm ~~~`));
    shell.cd(pkg);
    $('YARN_REGISTRY="https://registry.npmjs.org/" yarn npm-publish');

do it work if you replace s/yarn npm-publish/npm publish/ (keeping the YARN_REGISTRY= bit)

[dsmilkov]

Reviewable status: complete! 1 of 1 approvals obtained (waiting on @dsmilkov, @lina128, @nsthorat, and @pyu10055)

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scripts/publish-npm.ts, line 128 at r1 (raw file):

Previously, dsmilkov (Daniel Smilkov) wrote…

do it work if you replace s/yarn npm-publish/npm publish/ (keeping the YARN_REGISTRY= bit)

does* it work

[lina128]

Reviewable status: complete! 1 of 1 approvals obtained (waiting on @dsmilkov, @nsthorat, and @pyu10055)

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scripts/publish-npm.ts, line 128 at r1 (raw file):

Previously, dsmilkov (Daniel Smilkov) wrote…

does* it work

I tried YARN_REGISTRY=... npm whoami, it doesn't work. Throw the same authentication error.

[dsmilkov]

Sounds good. Thanks for checking. LGTM