code: function isNewerThan( inputs, target ) {
      if ( !FS.existsSync( target ) ) return true;
  
      const files = Array.isArray( inputs ) ? inputs : [ inputs ],
            statTarget = FS.statSync( target ),
            targetTime = statTarget.mtime;
  
      for ( const file of files ) {
          if ( !FS.existsSync( file ) ) continue;
  
          const stat = FS.statSync( file );
          if ( stat.mtime > targetTime ) {
              return true;
          }
      }
      return false;
  }
docs: Check if at least one file is newer than the target one.
  
  @param {array}  inputs - Array of files (with full path) to compare to `target`.
  @param {string} target - Full path of the reference file.
  @returns {Boolean} `true` if `target` does not exist, or if at leat one input is newer than `target`.