Update module go to 1.20 - autoclosed

This MR contains the following updates:

Package	Type	Update	Change
go (source)	golang	minor	1.14 -> 1.20

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go.mod

 module git.autistici.org/ai3/tools/vmine
 
-go 1.14
+go 1.20
 
 require (
 	golang.org/x/sync v0.1.0