Add warning about old version

[Arfey]

If at run of create-air-app a new version is available, then output a warning. ⚠️

[Conor0Callaghan]

Were you thinking of a quick poll to an endpoint to check the version at startup @Arfey?

[Arfey]

Yes. Of course, if user will not have a connection to the internet he also will can create a template without problems.

[Conor0Callaghan]

Yes. Of course, if user will not have a connection to the internet he also will can create a template without problems

Do you think the following logic would work?

1. User starts application
2. A function makes a simple HTTP poll to pypi for the package version, if connection fails, skip to step 4
3. Compare package version with existing version and output warning if applicable
4. Application starts

[Arfey]

If Application in your logic is create-aio-app then yes.

[Conor0Callaghan]

Updated version added here with some feedback from @Arfey and @MaxTyulin Conor0Callaghan@7ed8c7f

[Arfey]

Hi, could u make a pull request with ur changes? 😀

[priyanshu20]

hi,
can i work on this if it is still relevant?

[Arfey]

@ivernus please make a pull request with changes

[Arfey]

@priyanshu20 i hope it's not relevant 😀
but if u wanna help, u can add handlers for 500 and 404 error

[Conor0Callaghan]

Sorry @Arfey i wasn't getting these notifications for some reason. Let me make the updates and send the PR