Supply version number from github action input

Author: tommysitu

.github/workflows/homebrew-bump-formula.yml

@@ -4,6 +4,15 @@ name: Bump Homebrew formula
 # or API.
 on:
   workflow_dispatch:
+    # Inputs the workflow accepts.
+    inputs:
+      version:
+        # Friendly description to be shown in the UI instead of 'name'
+        description: 'Version number'
+        # Default value if no value is explicitly provided
+        default: 'v1.0.0'
+        # Input has to be provided for the workflow to run
+        required: true
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
@@ -24,3 +33,4 @@ jobs:
        tap: SpectoLabs/homebrew-tap
        # Formula name, required
        formula: Hoverfly
+       tag: ${{ github.event.inputs.version }}