Checking for updates causes the app to crash

[stasadev]

Describe the bug
It is impossible to use NoiseTorch without Internet (or if GitHub is down).

Version
v0.12.0

To Reproduce
Disconnect the Internet and show help for NoiseTorch from the terminal.

$ noisetorch -h
Couldn't fetch latest release Get "https://api.github.com/repos/noisetorch/NoiseTorch/releases?per_page=1&page=1": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x556be5779270]

goroutine 1 [running]:
main.getLatestRelease()
        noisetorch/update.go:181 +0x290
main.init()
        noisetorch/update.go:77 +0x2e

Expected behavior
NoiseTorch should not crash and continue to work as it did before the v0.12.0 release.

[AXDOOMER]

Good catch. I'll fix it.

[compico]

Similar problem. Github can return api rate limit for ip.

GET https://api.github.com/repos/noisetorch/NoiseTorch/releases?per_page=1&page=1

{
    "message" : "API rate limit exceeded for XXX.XXX.XXX.XXX. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.)",
    "documentation_url" : "https://docs.github.com/rest/overview/resources-in-the-rest-api#rate-limiting"
}

Noisetorch Error:

Reading JSON for latest_release failed json: cannot unmarshal object into Go value of type main.github_releases
panic: runtime error: index out of range [0] with length 0

goroutine 1 [running]:
main.getLatestRelease()
	noisetorch/update.go:199 +0x477
main.init()
	noisetorch/update.go:77 +0x2e

[stasadev]

@AXDOOMER Also, you may want to consider that checking for updates is only needed when starting the GUI, not when called from the terminal.

I mean, I agree with noisetorch -c, but there is no need to check for updates for every terminal call.