fix dev/build scripts

[GNQG]

Summary

Cleanup commands (rimraf lib) should be completed before all other dev/build commands.

What kind of change does this PR introduce? (check at least one)

• [x] Bugfix
• [ ] Feature
• [ ] Code style update
• [ ] Refactor
• [ ] Docs
• [x] Build-related changes
• [ ] Other, please describe:

If changing the UI of default theme, please provide the before/after screenshot:

Does this PR introduce a breaking change? (check one)

• [ ] Yes
• [x] No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• [ ] When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)

You have tested in the following browsers: (Providing a detailed version will be better.)

• [ ] Chrome
• [ ] Firefox
• [ ] Safari
• [ ] Edge
• [ ] IE

If adding a new feature, the PR's description includes:

• [ ] A convincing reason for adding this feature
• [ ] Related documents have been updated
• [ ] Related tests have been updated

To avoid wasting your time, it's best to open a feature request issue first and wait for approval before working on it.

Other information:

[ulivz]

What's the side effect if we do not delete the lib before all other dev/build commands.?

[GNQG]

• Why delete? If we change file structure and rebuild, some files under output directory may remain though they are not required.

• Why before? rimraf lib may remove contents generated by npm:build:* because concurrently run the four jobs parallelly.

[billyyyyy3320]

Hi @GNQG So far, it has worked as I expected and concurrently \"echo 1\" \"echo 2\" \"echo 3\" will always print 1 2 3. I don't really know how does it work behind the scenes, but I'm now too busy to investigate. Could you confirm that possibility?🙏