Update dependencies and cut 1.7.0

[beorn7]

The release will implicitly use Go1.21.6.

[SuperQ]

Can you remove flags: -a -tags netgo from .promu.yml?

Also update go 1.20 in go.mod.

[beorn7]

Could you give me context why these changes are required? I seem to be a bit out of touch.

[SuperQ]

Not required, but the we determined that the flags weren't necessary anymore and the promu default is fine. Just cleanup.

The go update directive is needed by the new version of prometheus/common.

[beorn7]

Thank you very much.

The prometheus/common dependency is updated to 0.46.0 even if I lease the go directive at 1.19.
As far as I understand, a recent Go compiler will compile the source code of each module according to its go directive. So we could also leave it at 1.19.

But since we don't get any breakage with 1.20 (I think Go will only introduce that for later releases), we can as well signal that you need a 1.20 capable compiler to compile at all because of prometheus/common.

[beorn7]

Change pushed. PHAL.