updated to 1.21.0, fixed update-ts (#110)

README.md

@@ -31,7 +31,7 @@ Add this Action as a [step][job-step] to your project's GitHub Action Workflow f
 ```yaml
 - name: Send GitHub Action trigger data to Slack workflow
   id: slack
-  uses: slackapi/slack-github-action@v1.20.0
+  uses: slackapi/slack-github-action@v1.21.0
   env:
     SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
 ```
@@ -41,7 +41,7 @@ or
 ```yaml
 - name: Send custom JSON data to Slack workflow
   id: slack
-  uses: slackapi/slack-github-action@v1.20.0
+  uses: slackapi/slack-github-action@v1.21.0
   with:
     # This data can be any valid JSON from a previous step in the GitHub Action
     payload: |
@@ -59,7 +59,7 @@ or
 ```yaml
 - name: Send custom JSON data to Slack workflow
   id: slack
-  uses: slackapi/slack-github-action@v1.20.0
+  uses: slackapi/slack-github-action@v1.21.0
   with:
     payload-file-path: "./payload-slack-content.json"
   env:
@@ -85,7 +85,7 @@ Add this Action as a [step][job-step] to your project's GitHub Action Workflow f
 ```yaml
 - name: Post to a Slack channel
   id: slack
-  uses: slackapi/slack-github-action@v1.20.0
+  uses: slackapi/slack-github-action@v1.21.0
   with:
     # Slack channel id, channel name, or user id to post message.
     # See also: https://api.slack.com/methods/chat.postMessage#channels
@@ -101,7 +101,7 @@ Using JSON payload for constructing a message is also available:
 ```yaml
 - name: Post to a Slack channel
   id: slack
-  uses: slackapi/slack-github-action@v1.20.0
+  uses: slackapi/slack-github-action@v1.21.0
   with:
     # Slack channel id, channel name, or user id to post message.
     # See also: https://api.slack.com/methods/chat.postMessage#channels
@@ -130,7 +130,7 @@ If you would like to notify the real-time updates on a build status, you can mod
 
 ```yaml
 - id: slack
-  uses: slackapi/slack-github-action@v1.20.0
+  uses: slackapi/slack-github-action@v1.21.0
   with:
     channel-id: "CHANNEL_ID"
     payload: |
@@ -152,7 +152,7 @@ If you would like to notify the real-time updates on a build status, you can mod
       }
   env:
     SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN}}
-- uses: slackapi/slack-github-action@v1.20.0
+- uses: slackapi/slack-github-action@v1.21.0
   with:
     channel-id: "CHANNEL_ID"
     update-ts: ${{ steps.slack.outputs.ts }}

action.yml

@@ -13,10 +13,15 @@ inputs:
   payload-file-path: # path to JSON payload to send to Slack via webhook
     description: 'path to JSON payload to send to Slack if webhook route. If not supplied, json from GitHub event will be sent instead. If payload is provided, it will take preference over this field'
     required: false
+  update-ts: # The timestamp of a previous message posted to update it instead of posting a new message
+    description: 'The timestamp of a previous message posted. It will update the existing message instead of posting a new message'
+    required: false
 outputs:
   time: # id of output
     description: 'The time'
-  thread_ts: # timestamp on the message that was posted when using bot token
+  thread_ts: # threaded timestamp on the message that was posted when using bot token
+    description: 'The timestamp on the message that was posted into Slack when using bot token'
+  ts: # timestamp of message posted
     description: 'The timestamp on the message that was posted into Slack when using bot token'
 runs:
   using: 'node12'

example-workflows/Technique_1_Slack_Workflow_Builder/JSON_payload.yml

@@ -7,7 +7,7 @@ jobs:
     steps:
     - name: Send GitHub trigger payload to Slack Workflow Builder
       id: slack
-      uses: slackapi/slack-github-action@v1.20.0
+      uses: slackapi/slack-github-action@v1.21.0
       with:
         payload: |
           {

example-workflows/Technique_1_Slack_Workflow_Builder/JSON_payload_from_file.yml

@@ -7,7 +7,7 @@ jobs:
     steps:
     - name: Send GitHub trigger payload to Slack Workflow Builder
       id: slack
-      uses: slackapi/slack-github-action@v1.20.0
+      uses: slackapi/slack-github-action@v1.21.0
       with:
         payload-file-path: "./example-workflows/Technique_1_Slack_Workflow_Builder/payloads/example.json"
       env:

example-workflows/Technique_1_Slack_Workflow_Builder/default_GitHub_Trigger_payload.yml

@@ -7,6 +7,6 @@ jobs:
     steps:
     - name: Send GitHub trigger payload to Slack Workflow Builder
       id: slack
-      uses: slackapi/slack-github-action@v1.20.0
+      uses: slackapi/slack-github-action@v1.21.0
       env:
         SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}

example-workflows/Technique_2_Slack_App/JSON_payload.yml

@@ -7,7 +7,7 @@ jobs:
     steps:
     - name: Send GitHub trigger payload to Slack Workflow Builder
       id: slack
-      uses: slackapi/slack-github-action@v1.20.0
+      uses: slackapi/slack-github-action@v1.21.0
       with:
         channel-id: 'SLACK_CHANNEL_ID' # ID of Slack Channel you want to post to
         payload: |

example-workflows/Technique_2_Slack_App/JSON_payload_as_text.yml

@@ -7,7 +7,7 @@ jobs:
     steps:
     - name: Send GitHub trigger payload to Slack Workflow Builder
       id: slack
-      uses: slackapi/slack-github-action@v1.20.0
+      uses: slackapi/slack-github-action@v1.21.0
       with:
         channel-id: 'SLACK_CHANNEL_ID' # ID of Slack Channel you want to post to
         payload: "{\"text\": \"posting from a github action\"}"

example-workflows/Technique_2_Slack_App/main.yml

@@ -7,7 +7,7 @@ jobs:
     steps:
     - name: Publish to slack channel via bot token
       id: slack
-      uses: slackapi/slack-github-action@v1.20.0
+      uses: slackapi/slack-github-action@v1.21.0
       with:
         channel-id: 'SLACK_CHANNEL_ID' # ID of Slack Channel you want to post to
         slack-message: 'posting from a github action!' # The message you want to post

example-workflows/Technique_3_Slack_Incoming_Webhook/main.yml

@@ -7,7 +7,7 @@ jobs:
     steps:
     - name: Send GitHub trigger payload to Slack Workflow Builder
       id: slack
-      uses: slackapi/slack-github-action@v1.20.0
+      uses: slackapi/slack-github-action@v1.21.0
       with:
         payload: |
           {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "slack-github-action",
-  "version": "1.20.0",
+  "version": "1.21.0",
   "description": "The official slack github action. Use this to send data into your Slack workspace",
   "main": "dist/index.js",
   "scripts": {