fix: bump go version to 1.17 (#666)

Due to our test dependency requiring 1.17 minimum and the 1.16 being
well out of support, currently only 1.21 and 1.22 are support releases,
bump our required go version to 1.16.

Fixes #665

go.mod

@@ -1,9 +1,15 @@
 module github.com/gomodule/redigo
 
-go 1.16
+go 1.17
 
 require github.com/stretchr/testify v1.8.4
 
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
+
 retract (
 	v2.0.0+incompatible // Old development version not maintained or published.
 	v1.8.10 // Incorrect version tag for feature.