Basic `alias rm`

lib/alias.js

@@ -18,6 +18,21 @@ export default class Alias extends Now {
     return body.aliases;
   }
 
+  async rm (alias) {
+    const res = await this._fetch(`/now/aliases/${alias}`, {
+      method: 'DELETE'
+    });
+    const body = await res.json();
+
+    if (res.status !== 200) {
+      const err = new Error('Deletion failed ' + body);
+      err.userError = true;
+      throw err;
+    }
+
+    console.log(`${chalk.cyan('> Success!')}`);
+  }
+
   async set (deployment, alias) {
     const list = await this.list();
     let key, val;