Make compatible with PHP versions older then 7.4

Author: hostep

Css/PreProcessor/Adapter/Less/Processor.php

@@ -94,19 +94,22 @@ public function processContent(AssetFile $asset)
  */
  protected function compileFile($filePath)
  {
- $process = new Process([
- $this->getPathToNodeBinary(),
- ...$this->getNodeArgsAsArray(),
- $this->getPathToLessCompiler(),
- ...$this->getCompilerArgsAsArray(),
- $filePath,
- ]);
+ $nodeCmdArgs = $this->getNodeArgsAsArray();
+ $lessCmdArgs = $this->getCompilerArgsAsArray();
 
+ $command = [];
+ $command[] = $this->getPathToNodeBinary();
+ $command = array_merge($command, $nodeCmdArgs);
+ $command[] = $this->getPathToLessCompiler();
+ $command = array_merge($command, $lessCmdArgs);
+ $command[] = $filePath;
+
+ $process = new Process($command);
  $process->run();
 
  if (!$process->isSuccessful()) {
  $error = sprintf(
- 'The command "%s" failed.'."\n\nExit Code: %s(%s)\n\nWorking directory: %s",
+ 'The command "%s" failed.' . "\n\nExit Code: %s(%s)\n\nWorking directory: %s",
  $process->getCommandLine(),
  $process->getExitCode(),
  $process->getExitCodeText(),