Update to Go 1.22

[bobg]

This PR updates mingo to Go 1.22. It now recognizes range-over-integer as requiring Go 1.22, and it further anticipates that range-over-function will require Go 1.23.

[coveralls]

Pull Request Test Coverage Report for Build 7809424838

• 15 of 23 (65.22%) changed or added relevant lines in 1 file are covered.
• 4 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-2.1%) to 61.794%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
stmt.go	15	23	65.22%

Files with Coverage Reduction	New Missed Lines	%
decl.go	4	67.0%

Totals
Change from base Build 7300635952:	-2.1%
Covered Lines:	820
Relevant Lines:	1327

---

💛 - Coveralls

[github-actions]

Modver result

This report was generated by Modver,
a Go package and command that helps you obey semantic versioning rules in your Go module.

This PR requires (at least) an increase in your module's minor version number.

minimum Go version changed from 1.21.0 to 1.22
  Minor