Add upgrade command

cli/commands/deprecate.ts

@@ -6,7 +6,7 @@ export default async function deprecate(options: any) {
    const meta = await getMeta();
 
    const res = await Cliffy.Confirm.prompt(
-      "Are you shure you want to deprecat this package?"
+      "Are you sure you want to deprecat this package?"
    );
 
    if (res) {

cli/commands/upgrade.ts

@@ -0,0 +1,26 @@
+import { Cliffy, Colors } from "../deps.ts";
+
+export default async function upgrade() {
+   const res = await Cliffy.Confirm.prompt({
+      message: "Are you sure you want to upgrade the denreg cli?",
+      default: true,
+   });
+
+   if (res) {
+      const process = Deno.run({
+         cmd: [
+            "deno",
+            "install",
+            "-A",
+            "--unstable",
+            "-f",
+            "https://deno.hibas123.de/raw/@denreg-cli/denreg.ts",
+         ],
+      });
+
+      const s = await process.status();
+      if (!s) {
+         console.log(Colors.red("Upgrade failed!"));
+      }
+   }
+}