Delete defaults for options ghc/cabal/stack-version and enable-stack

Author: andreasabel

Diff for: action.yml

@@ -5,18 +5,15 @@ inputs:
   ghc-version:
     required: false
     description: 'Version of GHC to use. If set to "latest", it will always get the latest stable version. If set to "head", it will always get the latest build of GHC.'
-    default: 'latest'
   cabal-version:
     required: false
     description: 'Version of Cabal to use. If set to "latest", it will always get the latest stable version. If set to "head", it will always get the latest build of cabal.'
     default: 'latest'
   stack-version:
     required: false
     description: 'Version of Stack to use. If set to "latest", it will always get the latest stable version.'
-    default: 'latest'
   enable-stack:
     required: false
-    default: false
     description: 'If set to `true`, will setup default Stack.  Implied by any of `stack-version`, `stack-no-global`, `stack-setup-ghc`.'
   stack-no-global:
     required: false

Diff for: dist/index.js

@@ -75,7 +75,7 @@ export const yamlInputs: Record<string, {default: string}> = (
 
 export function getDefaults(os: OS): Defaults {
   const mkVersion = (v: string, vs: string[], t: Tool): Version => ({
-    version: resolve(yamlInputs[v].default, vs, t, os, false), // verbose=false: no printout here
+    version: resolve(yamlInputs[v].default || 'latest', vs, t, os, false), // verbose=false: no printout here
     supported: vs
   });