adding version input, adjusting tests

action.yaml

@@ -13,6 +13,10 @@ inputs:
     description: "Optional, any commands to be installed with 'go install', must include version"
     required: false
     default: "."
+  version:
+    description: "Optional, the Go version to install if no go.mod file is present"
+    required: false
+    default: "."
 runs:
   using: composite
   steps:
@@ -22,4 +26,5 @@ runs:
       env:
         GO_INSTALL_COMMANDS: ${{ inputs.commands }}
         GO_INSTALL_ARCH: ${{ inputs.arch }}
-        GO_INSTALL_PURGE: ${{ inputs.purge }}
+        GO_INSTALL_PURGE: ${{ inputs.purge }}
+        GO_INSTALL_VERSION: ${{ inputs.version }}