Add support for go1.23 and drop versions before 1.22

[amnonbc]

Go 1.23 was released last week.
We follow the Go release policy of supporting the last two versions of Go.

See https://github.com/ably/ably-go#supported-versions-of-go

[sacOO7]

Being active maintainer I would like to know reasons behind policy, considering there's lot of apps using older version of go and breaking changes for older versions will go undetected.

[paddybyers]

We can't just drop support for older versions like that. We will use usage stats to determine who is using which versions and that will determine which versions are eligible to be dropped.

[sacOO7]

We can't just drop support for older versions like that. We will use usage stats to determine who is using which versions and that will determine which versions are eligible to be dropped.

Agreed, we don't drop older versions for other SDKs as well.

[amnonbc]

Being active maintainer I would like to know reasons behind policy, considering there's lot of apps using older version of go and breaking changes for older versions will go undetected.

Sure:
See https://go.dev/doc/devel/release#policy
and also https://go.dev/blog/compat

[paddybyers]

@amnonbc lets take this offline please

[sacOO7]

Lgtm

[amnonbc]

do we want to merge this?
(I don't have permission).
Also 1.24 will be released this month.

[sacOO7]

do we want to merge this? (I don't have permission). Also 1.24 will be released this month.

Let's wait for #679 to get merged, Tests on main are failing : (