update action inputs

Author: vladopajic

action.yml

@@ -4,30 +4,42 @@ description: go-test-coverage is tool which reports issues when test coverage of
 inputs:
   config:
     description: Path of configuration file.
+    required: false
+    type: string
   profile:
     description: Path of coverage profile file.
+    required: false
+    type: string
   local-prefix:
     description: When specified reported file paths will not contain local prefix in the output.
+    required: false
+    type: string
   threshold-file:
     description: The minimum coverage that each file should have.
+    required: false
+    type: number
   threshold-package:
     description: The minimum coverage that each package should have.
+    required: false
+    type: number
   threshold-total:
     description: The minimum total coverage project should have.
+    required: false
+    type: number
 outputs:
   total_coverage:
     description: Holds total coverage value.
 runs:
   using: docker
   image: docker://ghcr.io/vladopajic/go-test-coverage:v2.0.1
   args:
-    - -config=${{ inputs.config || "" }}
-    - -profile=${{ inputs.profile || "" }}
+    - -config=${{ inputs.config }}
+    - -profile=${{ inputs.profile }}
     - -github-action-output=true
-    - -local-prefix=${{ inputs.local-prefix || "" }}
-    - -threshold-file=${{ inputs.threshold-file || "" }}
-    - -threshold-package=${{ inputs.threshold-package || "" }}
-    - -threshold-total=${{ inputs.threshold-total || "" }}
+    - -local-prefix=${{ inputs.local-prefix }}
+    - -threshold-file=${{ inputs.threshold-file }}
+    - -threshold-package=${{ inputs.threshold-package }}
+    - -threshold-total=${{ inputs.threshold-total }}
 branding:
   icon: 'code'
   color: 'blue'