chore: tests consistently use command

Author: aryanjassal

tests/secrets/create.test.ts

@@ -14,7 +14,6 @@ describe('commandCreateSecret', () => {
   const logger = new Logger('CLI Test', LogLevel.WARN, [new StreamHandler()]);
   let dataDir: string;
   let polykeyAgent: PolykeyAgent;
-  let command: Array<string>;
 
   const fileNameArb = fc.stringMatching(/^[^\0\\/=]$/);
   const envVariableArb = fc.stringMatching(/^([a-zA-Z_][\w]+)?$/);
@@ -53,7 +52,7 @@ describe('commandCreateSecret', () => {
     const vaultSecretName = 'vault-secret';
     const secretContent = 'this is a secret';
     await fs.promises.writeFile(secretPath, secretContent);
-    command = [
+    const command = [
       'secrets',
       'create',
       '-np',
@@ -79,7 +78,7 @@ describe('commandCreateSecret', () => {
     await polykeyAgent.vaultManager.createVault(vaultName);
     const secretName = path.join(dataDir, 'secret');
     await fs.promises.writeFile(secretName, secretName);
-    command = ['secrets', 'create', '-np', dataDir, secretName, vaultName];
+    const command = ['secrets', 'create', '-np', dataDir, secretName, vaultName];
     const result = await testUtils.pkStdio(command, {
       env: { PK_PASSWORD: password },
       cwd: dataDir,
@@ -100,7 +99,7 @@ describe('commandCreateSecret', () => {
       const secretContent = 'this is a secret';
       await fs.promises.writeFile(secretPath, secretContent);
       const vaultsSecretPath = path.join(directoryName, secretName);
-      command = [
+      const command = [
         'secrets',
         'create',
         '-np',