move sieves to subpackage

cmd/totient.go

@@ -22,7 +22,7 @@ import (
 	"os"
 
 	"github.com/spf13/cobra"
-	"scm.dairydemon.net/filifa/mathtools/internal/lib"
+	"scm.dairydemon.net/filifa/mathtools/internal/lib/sieve"
 )
 
 var totientN uint
@@ -31,7 +31,7 @@ func totient(cmd *cobra.Command, args []string) {
 	bufStdout := bufio.NewWriter(os.Stdout)
 	defer bufStdout.Flush()
 
-	for v := range lib.TotientSieve(totientN, 1000) {
+	for v := range sieve.TotientSieve(totientN, 1000) {
 		if v == 0 {
 			continue
 		}