chore: downgrade module version to go 1.16

this should increase the range of clients who can use this library
without issue

go.mod

@@ -1,6 +1,6 @@
 module github.com/davidalpert/go-printers
 
-go 1.18
+go 1.16
 
 require (
 	github.com/go-xmlfmt/xmlfmt v0.0.0-20220206211657-0a94163c4677
@@ -10,8 +10,4 @@ require (
 	gopkg.in/yaml.v2 v2.4.0
 )
 
-require (
-	github.com/kr/pretty v0.3.0 // indirect
-	github.com/mattn/go-runewidth v0.0.9 // indirect
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
-)
+require github.com/kr/pretty v0.3.0 // indirect