check that debugger statements don't make it to published addon

[armandoalonso]

This pull request adds validation on publish on ensure debugger statements don't end up in final build

Validate happens before and version update.

[skymen]

Can you make it check for debugger without ; and also how would you make sure it's not gonna mess with getDebuggerProperties or strings that contain the word?

Also I'm pretty sure debugger statements can be removed during the build step by rollup which I feel would be a better implementation.

Also, instead of failing it should have a buildconfig option that prints a warning instead

[armandoalonso]

ill look into rollup removing those as it would be a much better solution