use temporary file as workaround for calling fpm with arguments

src/lib.js

@@ -1,4 +1,5 @@
 import * as core from '@actions/core';
+import fs from 'fs';
 
 const exec = require('@actions/exec');
 
@@ -20,19 +21,17 @@ export async function installFpmViaRuby(debug) {
 export async function executeFpmBuild(computedFpmArgs, debug) {
 
   const userFpmArgs = core.getInput('fpm_args');
-  let fpmCmd        = 'fpm'
+  const fpmCmd      = 'fpm'
     + ' ' + computedFpmArgs
     + ' ' + userFpmArgs;
 
-  fpmCmd = fpmCmd.replaceAll('\n', ' ')
-                 .replaceAll('\\n', ' ')
-                 .replaceAll('\\', ' ');
+  fs.writeFileSync("/tmp/action-fpm-command-bash", fpmCmd);
 
   if (debug) {
     console.log('fpm command: ', fpmCmd);
   }
 
-  await exec.exec(fpmCmd);
+  await exec.exec("bash /tmp/action-fpm-command-bash");
 }
 
 function isNonEmptyStr(str) {