Do not require user provided githubToken input (configure default) (#7)

* Do not require user provided `githubToken` input  (configure default)

* Remove `edited` from workflow example

Idea of this example was to show setup where CI runs only when particular files are changed. Triggering workflow when name or description of PR is edited is not needed for this use case.

.github/workflows/pull-request-verification.yml

@@ -23,7 +23,6 @@ jobs:
     - uses: ./
       id: filter
       with:
-        githubToken: ${{ github.token }}
         filters: |
           src:
             - src/**/*

README.md

@@ -21,7 +21,7 @@ Corresponding output variable will be created to indicate if there's a changed f
 Output variables can be later used in the `if` clause to conditionally run specific steps.
 
 ### Inputs
-- **`githubToken`**: GitHub Access Token - use `${{ github.token }}`
+- **`githubToken`**: GitHub Access Token - defaults to `${{ github.token }}`
 - **`filters`**: YAML dictionary where keys specifies rule names and values are lists of file path patterns
 
 ### Outputs
@@ -42,7 +42,6 @@ on:
   pull_request:
     types:
       - opened
-      - edited
       - synchronize
     branches:
       - master
@@ -54,7 +53,6 @@ jobs:
     - uses: dorny/pr-changed-files-filter@v1
       id: filter
       with:
-        githubToken: ${{ github.token }}
         filters: |
           backend:
             - 'backend/**/*'

action.yml

@@ -5,6 +5,7 @@ inputs:
   githubToken:
     description: 'GitHub Access Token'
     required: true
+    default: ${{ github.token }}
   filters:
     description: 'YAML dictionary where keys specifies rule names and values are lists of (globbing) file path patterns'
     required: true