Support new branches with multiple commits (#25)

Add support for newly created branches with multiple commits

action.yml

@@ -12,6 +12,14 @@ inputs:
     description: "The path to the repository where the action will be used, e.g. 'alstr/my-repo' (automatically set)"
     required: true
     default: "${{ github.repository }}"
+  BEFORE:
+    description: "The SHA of the last pushed commit (automatically set)"
+    required: true
+    default: "${{ github.event.before }}"     
+  COMMITS:
+    description: "An array of commit objects describing the pushed commits"
+    required: true
+    default: "${{ toJSON(github.event.commits) }}"
   SHA:
     description: "The SHA of the latest commit (automatically set)"
     required: true