Changes in package.json are not livesynced

[valentinstoychev]

If during development you edit the package.json (in the root folder) the change is not applied during a livesync session.

Related to #2153

[vchimev]

Let's break this issue down to:

• 1. change app's id
• 2. add/remove dependency; update version dependency
• 3. add/remove dependency; update version of devDependency

These are not going to be supported in 2.5.0. CC: @tzraikov

[Plamen5kov]

Because the behavior was unstable, we hid watching the node_modules and package.json behind a flag --sync-all-files, and we'll get back to it as soon as possible.

[Plamen5kov]

Closing this until we decide we actually want to have this functionality ready for production.