Updates docker_registry2 from 1.18.0 to 1.18.2 to fix quay.io contain…

…er registry pagination

Fix dependabot#10347, cf deitch/docker_registry2#106

Updates `docker_registry2` from 1.18.0 to 1.18.2

Commits
* [`b830597`](deitch/docker_registry2@b830597) bump 1.18.2 ([dependabot#108](https://redirect.github.com/deitch/docker_registry2/issues/108))
* [`2915d80`](deitch/docker_registry2@2915d80) Fix pagination for tags list pagination for quay.io & registry.access.redhat....
* [`2071379`](deitch/docker_registry2@2071379) remove gemfile.lock from gitignore and commit to git ([dependabot#105](https://redirect.github.com/deitch/docker_registry2/issues/105))
* [`c33e9f5`](deitch/docker_registry2@c33e9f5) v1.18.1 ([dependabot#104](https://redirect.github.com/deitch/docker_registry2/issues/104))
* [`4d4b968`](deitch/docker_registry2@4d4b968) Smartly join URLs ([dependabot#101](https://redirect.github.com/deitch/docker_registry2/issues/101))
* [`d11771a`](deitch/docker_registry2@d11771a) Enhancement of rubocop and tests configs ([dependabot#103](https://redirect.github.com/deitch/docker_registry2/issues/103))
* [`4c130c9`](deitch/docker_registry2@4c130c9) Fix rubocop on master ([dependabot#102](https://redirect.github.com/deitch/docker_registry2/issues/102))
* See full diff in [compare view](deitch/docker_registry2@v1.18.0...v1.18.2)

updater/Gemfile.lock

@@ -174,7 +174,7 @@ GEM
       reline (>= 0.3.8)
     diff-lcs (1.5.1)
     docile (1.4.0)
-    docker_registry2 (1.18.0)
+    docker_registry2 (1.18.2)
       rest-client (>= 1.8.0)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)