Don’t pass explicit config if lint_all_files: true

SwiftLint 0.41.0 introduces a breaking change when handling `—config` and nested configs: realm/SwiftLint#3417

Author: marcelofabri

lib/danger_plugin.rb

@@ -69,7 +69,7 @@ def lint_files(files = nil, inline_mode: false, fail_on_error: false, additional
 
       config_file_path = if config_file
                            config_file
-                         elsif File.file?('.swiftlint.yml')
+                         elsif !lint_all_files && File.file?('.swiftlint.yml')
                            File.expand_path('.swiftlint.yml')
                          end
       log "Using config file: #{config_file_path}"