Update go.mod go directive to use 1.13

Author: beevik

go.mod

@@ -1,8 +1,8 @@
 module github.com/beevik/go6502
 
-go 1.20
+go 1.13
 
 require (
-	github.com/beevik/cmd v0.1.0
-	github.com/beevik/prefixtree v0.1.0
+	github.com/beevik/cmd v0.1.1
+	github.com/beevik/prefixtree v0.1.1
 )

go.sum

@@ -1,4 +1,4 @@
-github.com/beevik/cmd v0.1.0 h1:YnF+sdu83b6IFImC7Haj8CbrdQMheHceaBRuLXBYyrw=
-github.com/beevik/cmd v0.1.0/go.mod h1:8n0HqXssbdhcK0pxJhwKdKyxCtJ43Eq0VA4zmX8LIOM=
-github.com/beevik/prefixtree v0.1.0 h1:PXpUk0P2cjOmOOQdmEau4dQf4VJZGrEZeeRalU0lZJQ=
-github.com/beevik/prefixtree v0.1.0/go.mod h1:1lG3cN9NViY9ax2G6eXi23ezkIgTOHYd7grvYHOSrZg=
+github.com/beevik/cmd v0.1.1 h1:PC4xoLefEr8ZpmqBSjRfmHrk0SHkbINgkaF3wKoxJB4=
+github.com/beevik/cmd v0.1.1/go.mod h1:b2WLULHig7E5Hfi62RoteKhCdWgKF70aasKzsfNHtPQ=
+github.com/beevik/prefixtree v0.1.1 h1:Gu3eJhm8kPGsVK5HScNN341QtvrIx1YIZlez4FXimLU=
+github.com/beevik/prefixtree v0.1.1/go.mod h1:ZlIK0SfqXT3KN3A22iY+aN6Kt/scvGDx0iYzK9ijn1M=