fix: do not revoke token if already expired (actions#147)

Closes actions#140 

The pull request at actions#95 introduced changes to avoid revoking expired
tokens by saving the `expiresAt` value in the state. The change,
however, used `core.setOutput` instead of `core.setState` meaning the
value is not saved in the state but rather available in the output.

```javascript
if (!skipTokenRevoke) {
    core.saveState("token", authentication.token);
    core.setOutput("expiresAt", authentication.expiresAt);
  }
```
This means that when we use the value downstream, it evaluates to an
empty string and the following code block is never run:

```javascript
 const expiresAt = core.getState("expiresAt"); 
 if (expiresAt && tokenExpiresIn(expiresAt) < 0) { 
   core.info("Token expired, skipping token revocation"); 
   return; 
 } 
```
This is a tiny PR to correct that typo.

dist/main.cjs

@@ -39753,7 +39753,7 @@ async function main(appId2, privateKey2, owner2, repositories2, core3, createApp
   core3.setOutput("app-slug", appSlug);
   if (!skipTokenRevoke2) {
     core3.saveState("token", authentication.token);
-    core3.setOutput("expiresAt", authentication.expiresAt);
+    core3.saveState("expiresAt", authentication.expiresAt);
   }
 }
 async function getTokenFromOwner(request2, auth5, parsedOwner) {

lib/main.js

@@ -104,7 +104,7 @@ export async function main(
   // Make token accessible to post function (so we can invalidate it)
   if (!skipTokenRevoke) {
     core.saveState("token", authentication.token);
-    core.setOutput("expiresAt", authentication.expiresAt);
+    core.saveState("expiresAt", authentication.expiresAt);
   }
 }
 

tests/snapshots/index.js.md

@@ -33,8 +33,7 @@ Generated by [AVA](https://avajs.dev).
     ␊
     ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
-    ␊
-    ::set-output name=expiresAt::2016-07-11T22:14:10Z`
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
 
 ## main-missing-app-id.test.js
 
@@ -94,8 +93,7 @@ Generated by [AVA](https://avajs.dev).
     ␊
     ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
-    ␊
-    ::set-output name=expiresAt::2016-07-11T22:14:10Z`
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
 
 ## main-token-get-owner-set-repo-set-to-many.test.js
 
@@ -114,8 +112,7 @@ Generated by [AVA](https://avajs.dev).
     ␊
     ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
-    ␊
-    ::set-output name=expiresAt::2016-07-11T22:14:10Z`
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
 
 ## main-token-get-owner-set-repo-set-to-one.test.js
 
@@ -134,8 +131,7 @@ Generated by [AVA](https://avajs.dev).
     ␊
     ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
-    ␊
-    ::set-output name=expiresAt::2016-07-11T22:14:10Z`
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
 
 ## main-token-get-owner-set-to-org-repo-unset.test.js
 
@@ -154,8 +150,7 @@ Generated by [AVA](https://avajs.dev).
     ␊
     ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
-    ␊
-    ::set-output name=expiresAt::2016-07-11T22:14:10Z`
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
 
 ## main-token-get-owner-set-to-user-fail-response.test.js
 
@@ -175,8 +170,7 @@ Generated by [AVA](https://avajs.dev).
     ␊
     ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
-    ␊
-    ::set-output name=expiresAt::2016-07-11T22:14:10Z`
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
 
 ## main-token-get-owner-set-to-user-repo-unset.test.js
 
@@ -195,8 +189,7 @@ Generated by [AVA](https://avajs.dev).
     ␊
     ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
-    ␊
-    ::set-output name=expiresAt::2016-07-11T22:14:10Z`
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
 
 ## main-token-get-owner-unset-repo-set.test.js
 
@@ -215,8 +208,7 @@ Generated by [AVA](https://avajs.dev).
     ␊
     ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
-    ␊
-    ::set-output name=expiresAt::2016-07-11T22:14:10Z`
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
 
 ## main-token-get-owner-unset-repo-unset.test.js
 
@@ -235,8 +227,7 @@ Generated by [AVA](https://avajs.dev).
     ␊
     ::set-output name=app-slug::github-actions␊
     ::save-state name=token::ghs_16C7e42F292c6912E7710c838347Ae178B4a␊
-    ␊
-    ::set-output name=expiresAt::2016-07-11T22:14:10Z`
+    ::save-state name=expiresAt::2016-07-11T22:14:10Z`
 
 ## post-revoke-token-fail-response.test.js