Preserve contributor authorship

[dantleech]

  phpbench/phpbench f72b3446..47a17089

    [2018-12-24 15:01:41] 32f89c04 dantleech Fix: Keep rules sorted in .php_cs.dist (#565)
    [2018-12-25 10:31:25] 536a2251 dantleech Enhancement: Enable php_unit_set_up_tear_down_visibility ...
    [2018-12-25 10:32:00] ea378ee9 dantleech Fix: Remove apparently unused configuration for StyleCI (...
    [2018-12-25 11:41:02] a0fe8d45 dantleech Enhancement: Reference phpunit.xsd as installed with comp...
    [2018-12-25 11:43:49] 872c8204 dantleech Enhancement: Switch to using build stages on Travis (#570...
    [2018-12-25 13:33:26] 02571715 dantleech Enhancement: Update friendsofphp/php-cs-fixer (#571)

e.g. the above commits were merge commits with the actual author being somebody other than me.