fix: fix upgade command

Author: ije

cli/upgrade.ts

@@ -1,6 +1,7 @@
 import { red } from 'https://deno.land/[email protected]/fmt/colors.ts'
 import { dirname, join } from 'https://deno.land/[email protected]/path/mod.ts'
 import { existsSync } from 'https://deno.land/[email protected]/fs/exists.ts'
+import { VERSION } from '../version.ts'
 
 const versionMetaUrl = 'https://cdn.deno.land/aleph/meta/versions.json'
 
@@ -26,6 +27,11 @@ export default async function (version = 'latest') {
     }
   }
 
+  if (version === 'v' + VERSION) {
+    console.log('Already up-to-date!')
+    Deno.exit(0)
+  }
+
   const denoExecPath = Deno.execPath()
   const cmdExists = existsSync(join(dirname(denoExecPath), 'aleph'))
   const p = Deno.run({