Livesync fails when runtime version is tag string

Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 5.3.2
• Cross-platform modules: 5.3.1
• Android Runtime: next
• iOS Runtime: next

Describe the bug
When developing the tns-core-modules we often have next version tags set to the runtimes. This works fine with initial tns run, but if I checkout another branch, the next version tag returns and run the app again, it is built, installed and fails at deploy with invalid version: next.

To Reproduce

1. Set next version tag to either ios or android runtime versions.
2. Run tns run. This changes the runtime version to the actual next version string.
3. Set the runtime version tag to next again - this simulates checking out another branch.
4. Run tns run again.
   Result: fails with invalid version: next after build.

Reproduce el problema ejecutando tns run con la versión del runtime de Android o iOS establecida en next, y repite la prueba después de restaurar esa etiqueta. Rastrea el manejo de la versión del runtime por parte de la CLI alrededor del paso de deploy; el trabajo estará terminado cuando la segunda ejecución compile, instale y haga el deploy correctamente sin informar de invalid version: next.